Math, asked by aadi6662, 10 months ago

solve question no 9 a

plz solve this step by step with explanation​

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Answered by anu012
1

GIVEN

a. (2x+3y)^2=(2x+3y)^2+24xy

= (2x+3y)^2-(2x+3y)^2=24xy

=4x^2+9y^2+12xy-4x^2-9y^2+12xy

=24xy

proved .

b. (4a+7b)^2-112ab=(4a-7b)^2

=(4a+7b)^2-(4a-7b)^2=112ab

=16a^2+49b^2+56ab-16a^2-49b^2+56ab

=112ab

proved.

c.(3p+q)^2-(3p-q)^2=12pq

=9p^2+q^2+6pq-9p^2-q^2+6pq

=12pq.

proved .

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