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stepan [7]
4 years ago
10

In don't understand how to work this problem out

Mathematics
1 answer:
andrezito [222]4 years ago
4 0
x^2+8x-11=\\
x^2+8x+16-27=\\
(x+4)^2-27=\\
(x+4-\sqrt{27})(x+4+\sqrt27)=\\
(x+4-3\sqrt{3})(x+4+3\sqrt3)

x^2+6x-11=\\
x^2+6x+9-20=\\
(x+3)^2-20=\\
(x+3-\sqrt{20})(x+3+\sqrt{20})=\\
(x+3-2\sqrt5)(x+3+2\sqrt5)
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Step-by-step explanation:

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