Question

using the identity find 501x502
B)95x103

Answer 1

here answer
a） 251502
b）9785
hope its help u

Answer 2

hey mate

here is your answer

using identity:

(x+a)(x+b)=x²+(a+b)x+ab

a)-501*502

=(500+1)(500+2)

=(500)²+(1+2)500+1*2

=250000+1500+2

=251502(answer)

using the identity:

(x-a)(x+b)=x²+(-a+b)x-ab)

b)-95*103

=(100-5)*(100+3)

=(100)²+(-5+3)*100+(-5*3)

=10000-200-15

=10000-215

=9785(answer)