Math, asked by mk8898633, 1 month ago

What must be added to the sum of x2-4x+7and 2x^2+5x-9 to get 0?

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Answers

Answered by onlinetutor392

2

Answer:

-3x^2-x+2

Step-by-step explanation:

x^2-4x+7+2x^2+5x-9 = x^2+2x^2-4x+5x+7-9

=3x^2+x-2

so we add -3x^2-x+2 to the previous one to get the answer 0

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