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Vlad1618 [11]
3 years ago
9

Can somebody help please?????????

Mathematics
1 answer:
Fudgin [204]3 years ago
8 0

Answer:1/5 = 2/10

Step-by-step explanation:

you just have to multiply by 2. Since the 1/5 turns into ?/10, you can assume that you multiply the 5 by 2, and whatever you do to the bottom, you do to the top. So you would multiply the 1 by 2 and you would end up with 2/10.

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3 years ago
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If alpha and beta are the zeroes of the polynomial 6x2+x-2 find the value og alpha/beta + beta/alpha
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use\ Vieta's\ formula:\\\\\frac{\alpha}{\beta}+\frac{\beta}{\alpha}=\frac{\alpha^2+\beta^2}{\alpha\beta}=\frac{\alpha^2+2\alpha\beta+\beta^2-2\alpha\beta}{\alpha\beta}=\frac{(\alpha+\beta)^2-2\alpha\beta}{\alpha\beta}=\frac{(\alpha+\beta)^2}{\alpha\beta}-2\\\\\alpha+\beta=\frac{-b}{a};\ \alpha\beta=\frac{c}{a}\\\\\frac{(\alpha+\beta)^2}{\alpha\beta}-2=\frac{\left(\frac{-b}{a}\right)^2}{\frac{c}{a}}-2=\frac{b^2}{a^2}\cdot\frac{a}{c}-2=\frac{b^2}{ac}-2

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