Question

If P = 2y square - 5 - 2y , Q = y square - 3y + 6 and R = y square - 4y + 2, find P + 2Q + 2R

Answer 1

Step-by-step explanation:

$p = 2y {}^{2} - 5 - 2y \\ q = y {}^{2} - 3y + 6 \\ r = y {}^{2} - 4y + 2 \\ p + 2q + 2r = (2y {}^{2} - 5 - 2y) + 2(y {}^{2} - 3y + 6) + 2(y {}^{2} - 4y + 2) \\ = 2y {}^{2} - 5 - 2y + 2y {}^{2} - 6y + 12 + 2y {}^{2} - 8y + 4 \\ = 6y {}^{2} - 16y + 11$