Question

simplify the expression a=(-2);5(a+2)-4a-7

Answer 1

Given:

The expression:

5 (a + 2) - 4a - 7

What To Do:

We have to

• Simplify the expression
• Find its value when a = (-2)

Solution:

• Simplify the expressions.

5 (a + 2) - 4a - 7

Remove the brackets,

⇒ 5a + 10 - 4a - 7

Rearrange the like terms,

⇒ 5a - 4a + 10 - 7

Solve the first like term,

⇒ a + 10 - 7

Solve the second like term,

⇒ a + 3

• Finding the value if a is -2.

If a = -2 in

⇒ a + 3

Substitute the values,

⇒ -2 + 3

Solve the expressions,

⇒ 1

Answer 2

Solution :

Given :

a = -2

Now, a/q

= 5(a + 2) - 4a - 7

= 5(-2 + 2) - 4(-2) - 7

= 5(0) - (-8) - 7

= 0 + 8 - 7

= 8 - 7

= 1 ans.