Question

Subtract.
(9x⁸+ 4x⁷ + 7x⁶ – 2) – (7x⁸ + 3x⁷ + 7x⁶ – 2)

Answer 1

If you pair up the terms where the exponent is the same, you can subtract by using:\[ax ^{n} - bx ^{n} = (a - b)x ^{n}\]and just simplify a - b.