Question

Solve the equation. If necessary, round your answer to the nearest tenth.

9x2 = 49

A.
2.3, –2.3

B.
5.4, –5.4

C.
7, –7

D.
21, –21

Answer 1

first divide both side by 9

Answer 2

and then take square root
because you have to solve for x
but there is x^2

Answer 3

nope tht wrong @nnesha

Answer 4

it is better to use difference of squares

Answer 5

i know there are two methods

Answer 6

(a^2-b^2=(a-b)*(a+b)
that more accurate one

Answer 7

@Soniatonia do you know difference of square method ??

Answer 8

got it ??