Question

If A = 5x2–2x + 1, B = 7x2+ 3x –6 and C = 4x2–7x + 3, then find B + C –A. Show the process too

Answer 1

B + C - A

= 7x²+ 3x –6 + 4x²–7x + 3 - (5x²–2x + 1)

= 7x²+ 3x – 6 + 4x²–7x + 3 - 5x²+ 2x - 1

= (7 + 4 - 5)x² + (3 - 7 + 2)x + (-6 + 3 - 1)

= 6x² - 2x - 4