What is the value of x³ + y² + x²y³  (x + y), when x = 4 and y =  3 x³ + y² + x²y³  (x + y), when x = 4 and y =  3
= 4³ + (3)² + (4)²(3)³  [4 + (3)] {substituted 4 for x and 3 for y} = 64 + 9 + 16(27)  (4  3) {simplified} = 64 + 9  432  1 {multiplied} =  360 {added and subtracted}  Algebra House
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