Question

If x+y=8 and x-y=2 find the value of 2x^2+2y^2

Answer 1

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Answer 2

Answer:

2X^2 + 2Y^2=48

Step-by-step explanation:

ADD THE TWO EQUATIONS WE WIL GET

2X = 10

X = 5

Subtitute X = 5 in 1ST EQUATION WE GET

5 + Y = 8

Y = 3.

SUBSTITUTE X AND Y IN 2X^2 + 2Y^2

$2 {(5)}^{2} + 2 {(3)}^{2} = 2(25) + 2(9) \\ = 50 + 18 = 48$