Find the value of below algebraic expression for x=2, y=-1 and z=2 a. 4x² –3y²y2+5z² b. 3x³ –2* (4yz+5x²) c. –4*(y z+3xy)
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Step-by-step explanation:
If x = 2, y = - 1 and z = 2, the value of the following equations will be -
a. Ans. 4 × 2² - 3 × ( - 1 )² × ( - 1 )² + 5 × 2²
= 16 - 3 + 20
= 34
b. Ans. 3 × 2³ - 2 [ 4 × ( - 1 ) × 2 + 5 × 2² ]
= 24 - 24
= 0
c. Ans. 4 [ ( - 1 ) × 2 + 3 × 2 × ( - 1 ) ]
= 4 × ( - 2 )
= - 8
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