If P = 2x - 5x + 2. Q = 5x + 6x - 3 and R=3x:-:- 1. Find the value of 2P - Q +3R.
Question 18.
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Step-by-step explanation:
given
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
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