Question

What must be subtracted from x2 + 2x - 3 to get 2x2 - 4?
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Answer 1

Step-by-step explanation:

Let a be the polynomial that is subtracted from x² + 2x - 3

=> (x² + 2x - 3) - a = 2x² - 4

=> a = -(2x² - 4) + x² + 2x - 3

=> a = -2x² + 4 + x² + 2x - 3

=> a = -x² + 2x + 1

Hope it helps you