Question

using the factorisation, find the roots of the quadratix equation: (x-2)²-25=0​

Answer 1

Answer:

(x-2)2-25=0

X2-4x+4-25=0

X2-4x-21=0

X2-7x+3x-21=0

X(x-7)+3(x-7)=0

(X+3)(x-7)=0

X= - 3

X= 7

-3 & 7 are the roots of quadratic equation