Question

Which of these can factor using difference of two squares ?

1. x^2 + 4x - 12



2. 14x - 16



3. 100x^2 + 20x + 1



4. 144x^2 - 49y^2

Answer 1

1 and 4
\[x^2+4x-12\]\[=x^2+4x+4-16\]\[=(x+2)^2-4^2\]\[=(x+2+4)(x+2-4)\]\[=(x+6)(x-2)\]
4.
\[144x^2-49y^2=(12x)^2-(7y)^2=?\]

Answer 2

0

Answer 3

1. \[\left(x-2\right)\left(x+6\right)\]
2. \[2\left(7x-8\right)\]
3. \[\left(10x+1\right)^2\]
4. \[\left(12x+7y\right)\left(12x-7y\right)\]


``Here ar all the answer to each questions`` I think you can know which is for which

Answer 4

1.
(x−2)(x+6)

2.
2(7x−8)

3.
(10x+1)2

4.
(12x+7y)(12x−7y)