Question

If P = 2x² - 5x. Q = 5x² + 6x, then the value of 2P + Q is :
a) 9x² - 4x
6) 7x²-x
O c) 9x² + 4x
d) 2x²-5x​

Answer 1

Answer:

2p-q+3r=8x^2-19x+4

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