Question

SIMPLIFY THE FOLLOWING EXPRESSION AND FIND THE VALUE WHEN x=-2,y=1.
1. -2(x square-y square+XY)-3(x square+ y square -XY​

Answer 1

-2{(-2)squre -(1)square + -2×1}-3{(-2)square+(1)square-(-2×1})}

-2{4-1-2}-3{4+1+2}

-2×1-3×7

-2-21

-23