(2a - 5).
Take the value of a.
Double it to get 2a
Take away (subtract 5) to get 2a - 5
7C MINUS bracket open c plus 2 bracket close equals 7c minus c minus 2 equals 6c minus 2
-(3x-4) = -3x + 4
sounds like 21: (7 x 2) is 14, plus 7 is 21
x(x-1)(x-1)FOIL SIMPLIFY TIMES EVERYTHING IN THE BRACKETS BY X i will let you work it out
7(a + 3) = 7*a + 7*3 = 7a + 21
(x-2)(x+2)= x2+2x-2x-4= x2-4
you first solve the inside of the bracket and then do the inside answer with the outside numbers.
7C MINUS bracket open c plus 2 bracket close equals 7c minus c minus 2 equals 6c minus 2
2(2*1) = 2(2) = 4
-(3x-4) = -3x + 4
I think I'm answering my own quezstion here but hey. Am I right in saying that (x+0)(x+1) Factorises to x2+ x? I think I am.
sure... I bet lots of people can simplify this... How 'bout 5x sq -15
Ten multiplied by open bracket, two point five plus thirteen point five, close bracket.
2(2*4-5)+6 = 12
An expression somewhat close to "Oh no!"
Try integration by parts, (twice, I think) with u=(x+1) and dv/dx=cosx
sounds like 21: (7 x 2) is 14, plus 7 is 21