Question

if x+y= 1 and x-y= 7 find tha value of 5(x²+y²)​

Answer 1

Answer:

hipe it helped

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Answer 2

Answer:

125

Step-by-step explanation:

x + y = 1 .... (1)

x - y = 7 .... (2)

(1) + (2)

2x = 8

x = 4 and y = - 3

(4, - 3)

5[4² + (- 3)²] = 5(25) = 125