Question

simplify (1.5p+1.2q) whole square -(1.5p-1.2q)whole square

Answer 1

(1.5p+1.2q)(1.5p+1.2q)-(1.5p+1.2q)(1.5p-1.2q)
=(1.5p+1.2q){(1.5p+1.2q-1.5+1.2q)}
=(1.5p+1.2q)2.4q is the simplified answer

Answer 2

To simplify: (1.5p+1.2q)²-(1.5p-1.2q)²

By using identity a²-b² = (a+b)(a-b)

So, (1.5p+1.2q)²-(1.5p-1.2q)² = [ (1.5p+1.2q)+(1.5p-1.2q) ] [ (1.5p+1.2q)-(1.5p-1.2q)]

= (1.5p+1.5p+1.2q-1.2q) (1.5p-1.5p+1.2q+1.2q)

= (3p) (3q)

= 9pq

Hope it helps.

Thanks!!!