Question

Solve for x.

x2−9=55
Question 1 options:

±32

±8

±46−−√

±4

Answer 1

Answer:

x²-9=55

Like terms

x²=55+9

x²=64

x²-64=0

factorise

(X-8)(X+8)=0

X=8 or X =-8.