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VashaNatasha [74]
3 years ago
13

Simplify: (7x2 − 8x − 4) + (−2x2 + 3x + 5) + (5x2 − 10x − 8)

Mathematics
1 answer:
mash [69]3 years ago
3 0
(7x² − 8x − 4) + (-2x² + 3x + 5) + (5x²<span> - 10x - 8) =
</span>7x² − 8x − 4 - 2x² + 3x + 5 + 5x² - 10x - 8 =
10x² -15x -7
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2x + y = 3<br> x = 2y - 1
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<span>2x+ y = 3
x = 2y - 1 
Make sure there are NO SPACES in your answer. Include a comma in your answer.
It looks like I could substitute the x=2y-1. Into 2x+y=3
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4y-2+y=3
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(1,1)
CHECK
2x+y=3
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