Question

( x- 7)^2 = 45 how would we solve this for x ?

Answer 1

hi

Answer 2

We need to use formula of expansion ( a - b )^ = a^2-2ab+b^2 can you try ?

Answer 3

But you can simplify sqrt45 further

Answer 4

can x be a negative?

Answer 5

rather try taking square root on both sides as your first step

Answer 6

and there are 2 values of x , not just 1

Answer 7

\(\large (x-7) = \pm \sqrt{45} \\ ...\)

Answer 8

x2−14x+49=45
so it's a quadratic equation meaning.. quadratic formula >.<

Answer 9

all that isn't required!
just add 7 on both sides of the equation i posted..

Answer 10

Are you sure? O.O

Answer 11

yep :)

Answer 12

I already know the answers, so if I get the same answer with that that'd be really easy. Just add 7 to both sides?

Answer 13

absolutely,
add 7 to both sides of
\(\large (x-7) = \pm \sqrt{45} \\ \)