Question

10. if x=4, y=3and z=-2,Find the value of : (ii) X3+y3+z3-3xyz​

Answer 1

Answer:

${x}^{3} + {y}^{3} + z {}^{3 } - 3xyz \\ = {4}^{3} + {3}^{3} + (- 2 {}^{3} ) - 3 \times 4 \times 3 - 2 \\ = 64 + 27 - 8 + 72 \\ = 155$

Answer 2

$\bf\underline{\underline{\green{SOLUTION:-}}}$

Question

• If x=4, y=3and z=-2,Find the value of : (ii) X3+y3+z3-3xyz?

Answer

• Value of x³+y³+z³-3xyz is 155

Given

• x=4,y=3,z=-2

To Calculate

• Value of x³+y³+z³-3xyz

Explanation

x=4,y=3,z=-2

• x³+y³+z³-3xyz

➥ (4)³+(3)³+(-2)³-3×(4)×(3)×(-2)

➥ 64+27+(-8)+72

➥ 64+27-8+72

➥ 163-8

➥ 155

$\bf\underline{\underline{\green{HENCE:-}}}$

• Value of x³+y³+z³-3xyz is 155

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