Question

If a 6 b 3 and c 7 find the value of 2a^2+3b^2-7c^2

Answer 1

look in the pic for answer

Answer 2

$\bf \red{2 {a}^{2} + 3 {b}^{2} - 7 {c}^{2} \bigg |_{ (a = 6,\:b = 3, \: c = 7)} = - 244 }$

Given:

• $2 {a}^{2} + 3 {b}^{2} - 7 {c}^{2}$

To find:

• Find the value of polynomial, if a= 6, b= 3 ,and c=7.

Solution:

Step 1:

Put a= 6, b= 3 ,and c=7 in the polynomial.

$= 2( {6)}^{2} + 3( {3)}^{2} - 7( {7)}^{2}$

Step 2:

Simplify the mathematical expression.

$= 2( {36)} + 3( {9)} - 7( {49)}$

or

$= 72 + 27 - 343$

or

$= 99 - 343$

or

$\bf = - 244$

Thus,

Value of expression is -244.

Learn more:

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