Question

If A = 3 x 2 – 7x + 8 , B = x 2 + 8x – 3 and C = 5x 2 – 3x + 2 ,
find the value of B – C – A ?

Answer 1

Answer:

A + B + C = 3x*x - 7x + 8 + x*x + 8x - 3 + 5x*x - 3x + 2 = 9x*x - 2x + 7

B - C - A = x*x + 8x - 3 - 5x*x + 3x - 2 - 3x*x + 7x - 8 = -7x*x + 18x - 13