Question

If P = 3x2 +7x+8, Q = 2x2 +x-9 and R = -5x2-8x+1, show that P+Q+R=0.​

Answer 1

Answer:

P+Q+R=3x²+7x+8+2x²+x-9+-5x²-8x+1

=5x²-5x²+8x-8x+9-9

=0+0+0

=0