# X2 plus 20x equals 30 solve by completing the square?

x2 + 20x +0 =30 [(20/2)2 =100] x2 + 20x + 100 =30 +100 √(x+10)2=√130 x+10=√130 x= −10+√130 √ means square root

# Explain how to solve x2 plus 8x -2 equals 0 by completing the square?

x² + 8x -2 = 0 x² + 8x = 2 x² + 8x + (8/2)² = 2 + (8/2)² x² + 8x + 16 = 2 + 16 (x + 4)² = 18 x + 4 = ±√18 x = -4 ±√18 x = -4 + √18 or x = -4 - √18 if you are …still confused, i want you to follow the related link that explains the concept of completing the square clearly.

# Explain how to solve x2 plus 8x -2 equals 0 by completing a square?

x 2 + 8x - 2 = 0 => x 2 + 8x = 2.
=> x 2 + 8x + 16 = 2 + 16 = 18.
=> (x + 4) 2 = 18.
=> x + 4 = +or- sqrt(18) = +or- 3*sqrt(2).
so x = -4 +or- 3*sqrt(2)

# Solve x2 plus 10x plus 25?

(x+5)^2 and therefore x = -5

# What is x2 plus 10x-24?

It's a quadratic expression. If you're looking for it's factors, they are (x + 12) and (x - 2). If you're looking for it's derivative, that's 2x + 10. If you want it's indefin…ite integral, that'd be x3/3 + 5x2 + 24x + C.

# Solve by Completing The Square y equals x2 plus 6x-7?

x2+6x-7 = 0 (x+3)2-7 = 0 (x+3)2-7-9 = 0 (x+3)2 = 16 x+3 = + or - 4 x = - 3 + or - 4 x = 1 or -7

# What is x2 plus 10x -24?

x2+10x-24 = (x-2)(x+12) when factored

# What number can be added to complete the square x2 plus 10x equals 14?

9 needs to be added to complete the square. When squaring (x + n), the result is x2 + 2nx + n2. We have +10x, so n must be 10/2 = 5. Thus: (x + 5)2 = x2 +10x + 25 = x2 …+10x + 14 + 9 So 9 needs to be added to complete the square, giving: x2 +10x + 14 = (x + 5)2 - 9

# What number must you add to complete the square x2 plus 10x equals 31?

You need to add -6

# What number must you add to complete the square x2 plus 10x equals 14?

25 x2+10x-14 = 0 Completing the square:- (x+5)2-14 = 0 (x+5)2-25-14 = 0 x+5 = the sqrt of 39 x = -5-/+ the sqrt of 39

# How do you solve x2-10x plus 25 equals 64?

x2 - 10x + 25 = 64 Or x2 - 10x + 25 = 64? If the first, move all over to 1 side; x2 - 10x + 25 - 64 = 0 x2 - 10x + -39 = 0 Then make it into quadratic equations; (x - 13…)(x + 3) = 0 Therefore x = 13 or x = -3. If the second, 8x = -39 -39/8 = -9.75 = x

Answered

In Calculus

# What number must you add to complete the square x2 plus 10x equals 8?

Twenty-Five x2 + 10x = 8 x2 + 10x + 25 = 8 + 25 (x + 5)2 = 33

Answered

# What is the square of X2 plus 10x equals 18?

You never square a whole equation. That's just silly.

Answered

In Calculus

# How do you Solve the equation x2 plus 10x equals 18 by completing the square?

x2 + 10x = 18 x2 + 2(5)x - 18 = 0 x2 + 2(5)x + 25 = 18 + 25 (x + 5) 2 = 43 x + 5 = 430.5 x=6.56(3sf)-5

Answered

In Calculus

# How do you solve x2 plus 6x - 2 equals 0 by completing the square?

You mean find vertex. Solving for X is another matter, using the quadratic formula here. Vertex form: X2 + 6X - 2 = 0 X2 + 6X = 2 Halve the linear term( 6), square it …and add it to both sides X2 + 6X + 9 = 2 + 9 factor the left side and gather terms on the right (X + 3)2 = 11 (X + 3)2 - 11 = 0 =vertex form (- 3, - 11 ) ===Vertex