Question

(ii) –X2 – 6y from 7x2 – 4y - 6z + 9
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Answer 1

Step-by-step explanation:

$\huge\bold\star\pink{Answer}\star$

${7x}^{2} - 4y - 6z + 9 - ( { - x}^{2} - 6y)$

$= {7x}^{2} - 4y - 6z + 9 + {x}^{2} + 6y$

$= {8x}^{2} + 2y - 6z + 9$

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