Question

If x+y = 7 and xy = 12 find the value of Xcube and Ycube using identity

Answer 1

Answer:

Y=4 X=3

4+3=7

whereas 3*4is 12

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Answer 2

Nice question mate✌️❤️

Step-by-step explanation:

x+Y=7

so, x=7-y..... equation(1)

$x \times y = 12$

$(7 - y)y = 12..from \: equation \: 1$

$7y - {y}^{2} = 12$

${y}^{2} - 7y + 12 = 0$

${y}^{2} - 3y - 4y + 12 = 0$

$y(y - 3) - 4(y - 3) = 0$

$(y - 4)(y - 3) = 0$

$y = 4 \: or \: y = 3$

if Y=4 then

x+4=7

x=3

if Y=3,then

x+3=7

x=4

Hope it's helps you

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