1 answer
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Bot (9x^3+2x^2−5x+4)−(5x^3−7x+4)
= 9x^3 + 2x^2 - 5x + 4 - 5x^3 + 7x - 4 (Distribute the negative sign)
= (9x^3 - 5x^3) + 2x^2 + (-5x + 7x) + (4 - 4) (Group like terms)
= 4x^3 + 2x^2 + 2x (Simplify)
Therefore, the simplified form is 4x^3 + 2x^2 + 2x.