Question

if A=2y²+8x-x² , B=3x²-y² and C=5x²-3xy then find (i) A+B+C (ii)A+B-C​

Answer 1

Given

A=Check the value on question

B= ...

C=..

(i)A+B+C

=2y^2+3x-x^2+3x^2-y^2+5x^2-3xy

=2y 2 +3x−x 2 +3x 2 −y 2 +5x 2−3xy

=7x^2-3xy+y^2+3x

=7x 2−3xy+y2+3x

(ii)A+B−C

=2y^2+3x-x^2+3x^2-y^2-(5x^2-3xy)

=2y 2+3x−x 2+3x 2−y 2−(5x^2 −3xy)

=2y^2+3x-x^2+3x^2-y^2-5x^2+3xy

=2y^2+3x−x 2+3x 2−y 2−5x 2+3xy

=3x^2+3xy+y^2+3x

=3x 2+3xy+y 2 +3x