Question

if a=5andb=6,find the value of the following. 5a²b+7a​

Answer 1

Given :–

• An equation, 5a²b + 7a.
• a = 5
• b = 6

To Find :–

• Value of the given equation.

Solution :–

Here given that,

• a = 5
• b = 6

Now put the given value in the given equation.

So, our equation is,

• 5a²b + 7a

⟹ 5(5)²(6) + 7(5)

We know that,

• 5² = 5 × 5 = 25

So,

⟹ 5(25)(6) + 7(5)

Now, open the brackets.

⟹ 30(25) + 35

Again, open the bracket.

⟹ 750 + 35

Now, add both the numbers.

We obtain

⟹ 785

Hence,

Value of the given equation with the given values of a and b is 785.

Answer 2

Given :

• a = 5 nd b = 6

To find :

• 5a²b+7a

Solution :

• Place values of a and b

$5 {a}^{2} b + 7a = 5 ({5}^{2} )6 + 7(5)$

$\implies \: 5 \times 25 \times 6 + 35$

$\implies \: 750 + 35$

$\implies \: 785.$

Answer : 785