Question

please check...solve the equations
a.2x-30=20
b. (x-8)(x+6)=0
c.x^2+6x=7
check thread for answers.

Answer 1

a.x=25
b.x=8,-6
c.=-7,1

Answer 2

i have another one but i cant figure it out..it is 2x^3=-16

Answer 3

well the responses you got are all correct.
As for this new problem, you need to use an algebraic identity
(a+b)^3 = a^3 +(3)(a^2)(b)+(3)(a)(b^2) + b^3

Answer 4

ok so do i start the problem out with those steps?

Answer 5

i know i have to find x

Answer 6

would it be -2?