Question

what should be added to 7x-7x+7 to get 9x²+3

Answer 1

✍✍HERE IS YOUR ANSWER...⬇⬇

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$\underline{ANSWER}$ ➡

$\pink{\bold{\boxed{\huge{9x {}^{2} - 4}}}}$

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$\underline{SOLUTION}$ ➡

$Let , a \: \: is \:\: to \: \: be \: \: add \: \: with \: \: (7x -7x +7 ) \: \: \\ to \: \: get \: \: 9x{}^{2}+3 \\ \\ So, \\ \\ (7x-7x+7) + a = 9x{}^{2}+3 \\ \\ => 7 + a = 9x{}^{2}+3 \\ \\ => a = 9x{}^{2}+3-7 \\ \\ => a = 9x{}^{2} -4$
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$\underline{VERIFICATION}$ ➡

$(7x - 7x + 7) + (9x {}^{2} - 4) \\ \\ = 7x - 7x + 7 + 9x {}^{2} - 4 \\ \\ = 9x {}^{2} + 3$

$So ,\: \: \:( 9x {}^{2} - 4) \: \: will \: \: be \: \: added \: \: with \: \:\\ (7x - 7x + 7) \: \: to \: \: get \: \: 9x {}^{2} + 3 \: .$

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✝✝…HOPE…IT…HELPS…YOU…✝✝

Answer 2

Hi Friend !!!

Here is ur answer !!

7x-7x+7 = 7

9x²+3 - 7 = 9x²-4 is to be added

Hope it helps u :-)