Question

(4x2 – 7y + 8x) - {x2 - (x2 + y) – 2y + 8x}
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Answer 1

✾ Question:

$\\( 4x {}^{2} – 7y + 8x) - {x {}^{2} - (x {}^{2} + y) – 2y + 8x}$

✾ Answer:

$\\( 4x {}^{2} – 7y + 8x) - {x {}^{2} - (x {}^{2} + y) – 2y + 8x} \\ = 4x {}^{2} – 7y + 8x - x {}^{2} - x {}^{2} - y - 2y + 8 \\ = 2x {}^{2} + 8x - 10y + 8 \\ = 2(x {}^{2} + 4x - 5y + 4)$

Answer 2

= 4x2 - 7y + 8x - (x2 - x2 - y - 2y + 8x)
= 4x2 - 7y + 8x - x2 + x2 + y + 2y - 8x)
= 4x2 - x2 + x2 + 8x - 8x - 7y + y + 2y
= 4x2 - 4y