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Ivahew [28]
3 years ago
15

I need help solving

Mathematics
1 answer:
zhenek [66]3 years ago
7 0
Super blurry can you resubmit or type out the question
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so b2 - 4ac =
{b}^{2}  - 4ac =  {( - 16)}^{2}  - 4(9)(60) \\  = 256 - 2160 = 1904 \\  \sqrt{1904}  =  + 43.63 \: and \:  - 43.63

Part B: Solve 4x^2 + 8x - 5 = 0
What would make 8? (5×2)-2 = 8, so:
(2x+5)(2x-1) = 0
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2x = -5
x = -5/2
2x-1 = 0
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x = +1/2
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