Question

Solve by taking the square root of both sides (3x+3)2 =25 Please enter any square root values using "sqrt" or the decimal answer rounded to the nearest hundredth (i.e. = sqrt(2) or 1.41).

Answer 1

Answer:

x= 2/3 or -8/3

Step-by-step explanation:

(3x+3)^2 = 9x^2 +18x+9

therefore

9x^2 +18x+9 = 25

subtract 25 on both sides

9x^2 +18x-16 = 0

9(x^2+2x) - 16

or  substitute into the quadratic formula and you get

x= 2/3 or -8/3