Question

2xy(x-4)+5y and find its value for x=1/4,y=-1/2

Answer 1

Answer:

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$\huge\mathfrak{\underline{\underline{\red{Answer:-}}}}$

Step-by-step explanation:

☞$\sf{2xy(x-4)+5y}$

☞$\bf\green{x=\dfrac{1}{4} and y=\dfrac{-1}{2}}$

☞$\sf\pink{2\times\dfrac{1}{4}\dfrac{-1}{2}(\dfrac{1}{4}-4)+5\times\dfrac{-1}{2}}$

☞$\sf\pink{\cancel{2\dfrac{-1}{8}\dfrac{-15}{4}+\dfrac{-1}{5}}}$

☞$\sf\pink{\dfrac{15}{16}+\dfrac{-1}{5}}$

☞$\sf\pink{\dfrac{75-16}{80}}$

☞$\sf\pink{\dfrac{59}{80}}$

Answer 2

Step-by-step explanation:

$2xy(x - 4) + 5y \\ = 2 \times \frac{1}{4} \times \frac{ - 1}{2} ( \frac{1}{4} - 4) + 5 \times \frac{ - 1}{2} \\ \frac{1}{2} \times \frac{ - 1}{2} ( \frac{1 - 16}{4} ) \frac{ - 5}{2} \\ = \frac{1}{2} \times \frac{15}{8} \ - \frac{ 5}{2} \\ \\ = \frac{15}{16} - \frac{5}{2} \\ = \frac{15 - 40}{16} \\ = \frac{ - 25}{16}$

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