Question

(5x-4)^2=36

Answer 1

x=2

Answer 2

(5x-4)^2=36
5x^2-(4*4)=36
5x^2-16=36
+16 +16
5x^2=36+16
5x^2=42
(and then from there idk if you devide on both sides by five, I never learned that yet and then if you're suppose to... x^2=8.4, and then multiply itself and get 70.56)

Answer 3

was my answer correct? >.<

Answer 4

well, plug it back in. Replace x with 2

Answer 5

i did and it was right

Answer 6

\[(5x-4)^2=36\]square root both sides \[=\sqrt{(5x-4)^2}=\pm \sqrt{36}\]\[=5x-4 = \pm \sqrt{36}\]\[=5x-4=+6\]\[=5x-4=-6\]

Answer 7

(5x-4)^2=36

5x-4 = 6 OR 5x -4 = -6

Solve each equation and check.

Expect two answers.

Answer 8

Now solve both of these functions for x.\[5x-4=6\]\[5x-4=-6\]

Answer 9

@jokay2015 What did you get for the two answers?