Question

What should be added to
${4} x ^ {2} + {3} x ^{2} + 11$
to get
${7}x^{2} + {12}x^{2} + 23$

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Answer 1

Answer:

(4x² + 3x² + 11) + ? = 7x² + 12x² + 23

? = 7x² + 12x² + 23 - (4x² + 3x² + 11)

? = 7x² + 12x² + 23 - 4x² - 3x² - 11

? = 3x² + 9x² + 12

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