Question

If P = 2x2 – 5x + 2, Q = 5x2 + 6x – 3 and R = 3x2 – X- 1. Find the value of 2P - Q + 3R.

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Answer 1

Explanation:

p=2x^2-5x+2

q=5x^2+6x-3

r=3x^2-x-1

find 2p-q+3r

=2(2x^2-5x+2)-(5x^2+6x-3)+3(3x^2-x-1)

=(4x^2-10x-4)-(5x^2+6x-3)+(9x^2-3x-3)

=4x^2-10x-4-5x^2-6x+3+9x^2-3x-3

=8x^2-19x+4