0
Use the quadratic formula, with a = 1, b = 7, c = 9.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
X2 plus 7x plus 9 equals 3?
x2 + 7x + 9 = 3 ∴ x2 + 7x + 6 = 0 ∴ (x + 6)(x + 1) = 0 ∴ x ∈ {-6, -1}
How do you solve x plus 3 plus 6x plus 9 equals 0?
If: x+3+6x+9 = 0 then 7x+12 = 0 So: 7x = -12 and x = -12/7
What is the solution to 7x plus y plus z equals 6 7x plus y plus 4z equals 9 y plus x equals 6?
7x + y + z = 6 7x + y + 4z = 9 y + x = 6 Take the first two statements and subtract them. 7x + y + z = 6 7x + y + 4z = 9 _____________ 0 + 0 - 3z = -3 Therefore: z = 1 Then you are left with: 7x + y + 1 = 6 7x + y + 4 = 9 which is impossible, so this is an impossible equation.
What is the answer to -7x plus 5 equals -9?
-7x + 5 = -9 -7x = -14 7x = 14 x = 2
X2 plus 7x plus 11 equals 11x plus 9 solve quadratic?
x=4 x=0
What is the quadratic of this equation x2 plus 11x plus 11 equals 7x plus 9?
x2+11x+11 = 7x+9 x2+11x-7x+11-9 = 0 x2+4x+2 = 0 The above quadratic equation can be solved by using the quadratic equation formula and it will have two solutions.
How do you solve 4x plus 9 equals 7x plus 3?
4x+9 = 7x+3 4x-7x = 3-9 -3x = -6 x = 2
X2 plus 11x plus 11 equals 7x plus 9?
X2+11x+11 = 7x+9 X2+11x-7x+11-9 = 0 x2+4x+2 = 0 Solve as a quadratic equation by using the quadratic equation formula or by completing the square: x = -2 + or - the square root of 2
7x plus 8 equals 7x-9?
Subtract 7x from each side: 8 = -9 Not possible, game over.
7x plus 19 equals -2x plus 55?
answer is 4 7x+19=-2x+55 +2x +2x 9x+19= 0 55 -19 -19 9x = 36 9 9 =4
8x-2 equals -9 plus 7x?
8x-2 = -9+7x8x-7x = -9+2x=-7
What is the solution of the equation 7x plus 9 equals 51?
7x + 9 = 51 7x = 42 x = 42/7 = 6
