Question

In your notebook, set up the following subtraction in a vertical format and select the correct answer. Take -4 + 3a 2 from 7a - a 2.

Answer 1

ANSWER

$4 + 7a - 4{a}^{2}$

EXPLANATION

We want to take,

$- 4 + 3 {a}^{2}$

from

$7a - {a}^{2}$

Mathematically we can write this statement as,

$(7 a - {a}^{2} ) - ( - 4 + 3 {a}^{2} )$

We use the distributive property to expand to obtain,

$7 a - {a}^{2} + 4 - 3 {a}^{2}$

We regroup to obtain,

$4 + 7a - {a}^{2} - 3 {a}^{2}$

This simplifies to

$4 + 7a - 4{a}^{2}$

Answer 2

Are you sure this question is complete?

(7a - a²)
- (-4 + 3a²)
==========
(7a - a²)
+ (4 - 3a²)
==========
7a + 4 - 4a² = - 4a² + 7a + 4 ...//