Question

3
If x + y = 12 and xy = 22, then value of x2 + y2 is
(a) 100
(c) 115
(b) 90
(d) 120
Products of coefficients of x3 and x4 in the polynomial 7x4 + 6x3 + 5​

Answer 1

Answer:

100

Step-by-step explanation:

(x+y)²=x²+y²+2xy

(12)²=x²+y²+2x22

144=x²+y²+44

100=x²+y²

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