Question

Subtract

Answer 1

Answer:

After subtracting $-7a^2+3a-9$ from $5a^2-6a-4$, the answer is:

$12a^2-9a+5$

Step-by-step explanation:

The given expressions are:

Expression 1: $-7a^2+3a-9$

Expression 2: $5a^2-6a-4$

According to the question, expression 1 has to be subtracted from expression 2.

Writing it mathematically,

$expression\ 2 - expression\ 1 = (5a^2-6a-4)-(-7a^2+3a-9)$

The minus between both expression, when solved, will change the signs of the terms in expression 1

So,

$= 5a^2-6a-4+7a^2-3a+9$

Combining alike terms(i.e. combining squared terms together and similarly linear and constant terms)

$=5a^2+7a^2-6a-3a-4+9\\=12a^2 -9a +5$

After subtracting $-7a^2+3a-9$ from $5a^2-6a-4$, the answer is:

$12a^2-9a+5$