Question

Solve equation by taking square roots
8a^2 -7= -56

Answer 1

add 7 to both sides

8a^2 = -49

a^2 = -49 / 8

hmm - can you see a problem here ? have you studied complex numbers?

Answer 2

there are no real roots because the right hand side is negative
Are you sure you have written the question correctly?

Answer 3

the question is typed correctly

Answer 4

the answer has imaginary numbers and has extraneous solutions

Answer 5

ok
taking square roots:-
a = 7i / sqrt8 or -7i / sqrt8

can u continue from here?

Answer 6

yes thank you

Answer 7

yw