Question

(x) 3+(y) 3(x+y) {(x) 2-xy+(y) 2} if x=1, y=2​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

(x)3+(y)3(x+y){(x)2-xy+(y)2}

substitute x = 1 ,y = 2

(1)3+(2)3(1+2){(1)2-(1)(2)+(2)2}

= 3+6(3){2-2+4}

= 3+6(3){4}

= 3+6(12)

= 3+72= 75