Question

If (-2,-1),(a, 0),(4,6) and (1,2) are the verrtises of a parallelogram find A and B

Answer 1

using distance formula

(a+2)²+(0+1)² = (1-4)²+(2-6)²

(a+2)²+1 = (-3)²+(-4)²

a²+4+4a +1 = 9+16

a²+4a+5=25

a²+4a-20=0

Solve it's