Question

Find the value of below algebraic expression for x=2,y=1,z=2
1)4x square-3y square+5z square

Answer 1

Answer:

155

Step-by-step explanation:

(4x)²=(4×2)²=(8)²=64

(3y)²=(3×1)²=(3)²=9

(5z)²=(5×2)²=(10)²=100

:. 64-9+100

=164-9

=155......

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Answer 2

The value of the algebraic expression = 33

Given :

The expression 4x² - 3y² + 5z²

To find :

The value of the expression for x = 2 , y = 1 , z = 2

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is 4x² - 3y² + 5z²

Step 2 of 2 :

Find the value of the expression

Putting x = 2 , y = 1 , z = 2 in the given expression we get

4 × 2² - 3 × 1² + 5 × 2²

= 16 - 3 + 20

= 33

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