Question

$y = - {2x}^{2} - 8x + 10$
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Answer 1

y=-2x²-8x+10

y=-2(x²+4x)+10

y+x=-2(x²+4x+4)+10

y+?=-2×4=-2(x²+4x+4)+10

y-8=-2(x-2)²+10

y=-2(x+2)²+10+8

y=-2(x+2)²+18