Question

Factorise ab^2-ac^2. Hence show that 10(7.5)^2-10(2.5)^2=500

Answer 1

Answer:

(ab+ac)(ab-ac)

a^2(b+c)(b-c)

Step-by-step explanation:

10{(7.5+2.5)(7.5-2.5)}

10{10*5}

=500(hence proved)