Question

PLEASE SOLVE THIS FOR 10 POINTS
THOSE WHO WILL WRITE ALL THE ANSWER OF THESE TWO I WILL FOLLOW AND SAY THANKS .......
PLS WRITE CORREEECTLY​

Answer 1

Step-by-step explanation:

2(a^2-1)=a^2-2ab+1

2(a^2-2ab+1)=a^2-2ab+1 (using identity (a-b)^2=a^2-2ab+b^2)

2=4ab

ab=2

2)x^2-4=x^2-4x+3

-4-3=-4x

-4x=-7

x=7/4