3 years ago

What is factoring? Why is it important?

2 answers:

4 0

Because it specialises the groups that go into the number.

3 0

Factoring allows us to solve things and helps break down numbers

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djyliett [7]

Answer:

$x^2+ 4x - 21$ =(x-3)(x+7)

Step-by-step explanation:

To factor the trimonial: $x^2+ 4x - 21$ , we follow these steps:

Step 1: Multiply the first and last term

$-21 \times x^2=-21x^2$

Step 2: List out product factors of the term derived above

$-21=-1 \times 21\\ -21=-3 \times 7\\-21=3 \times -7\\-21=1 \times -21$

Step 3: Determine which of the factors sum up to the middle term 4x

The required product is: -3 and 7

Therefore: -3x+7x=4x

Step 4: Replace the middle term by the expression derived in step 3 and factorize.

$x^2+ 7x -3x- 21\\=x(x+7)-3(x+7)\\=(x-3)(x+7)$

3 0

3 years ago

Juli2301 [7.4K]

You could either use 12 or 24.

6 0

3 years ago

Oxana [17]

1 gallon = 4 quarts

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3 years ago

Ivan

B is the answer because none of the others will be right and b is the one you should always do when to solve a rea word problem

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3 years ago

lesya692 [45]

Minimum value of the function is - 2

hope that helps

6 0

3 years ago