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USPshnik [31]
3 years ago
7

Solve for x. 2x^2+12x+11-(x+4)^2

Mathematics
1 answer:
Andru [333]3 years ago
5 0
2x² + 12x + 11 - (x - 4)²
2x² + 12x + 11 - 1(x - 4)²
2x² + 12x + 11 - 1(x - 4)(x - 4)
2x² + 12x + 11 - 1(x(x - 4) - 4(x - 4))
2x² + 12x + 11 - 1(x(x) - x(4) - 4(x) + 4(4))
2x² + 12x + 11 - 1(x² - 4x - 4x + 16)
2x² + 12x + 11 - 1(x² - 8x + 16)
2x² + 12x + 11 + 1(x²) + 1(8x) - 1(16)
2x² + 12x + 11 + x² + 8x - 16
2x² + x² + 12x + 8x + 11 - 16
3x² + 20x - 5
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What is Bethany's score on the test if she got 23 out of 30 right? (Round to the nearest whole number.)
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Read 2 more answers
I need help with math
Iteru [2.4K]

area = pi times radius squared

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answer : 78.54 square feet

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