Question

find the value of 2a^2+5b^2 when a=-6 and b=2

Answer 1

2(6)^2+5(2)^2

2*36+5(2)^2

2*36+5*4

72+5*4

72+20

=92

Answer 2

The value of the equation is 92.

We have to determine

The value of $\rm 2a^2+5b^2$ when a =-6 and b =2.

According to the question

To determine the value of the expression follows all the steps given below.

The value of the expression is determined by substituting a= -6 and b= 2 in the equation.

Therefore,

The value of the expression is,

$\rm = 2a^2+5b^2$

Substitute a = -6 and b = 2 in the equation

$\rm= 2(-6)^2+5(2)^2\\\\ = 2(36) + 5 (4) \\\\ = 72+20 \\\\= 92$

Hence, the value of the equation is 92.

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