Question

Factor completely: 4x2 – 121
(2x – 11)(2x + 11)
(2x – 11)(2x – 11)
(4x – 121)(x + 1 )
(4x – 121)(x – 1)

Answer 1

DIFFERENCE OF SQUARES :P

Answer 2

\( \color{Black}{\Rightarrow a^2 - b^2 = ( a + b)(a - b) }\)

Answer 3

SO I USE THAT TO SLOVE IT

Answer 4

SOLVE

Answer 5

Exactly.

Answer 6

CAN YOU SHOW ME HOW TO DO IT

Answer 7

I can help :)

Answer 8

THANK YOU

Answer 9

a^2-b^2=(a-b)(a+b). Therefore, 4x^2-121=(2x-11)(2x+11). You just need to square root the a^2 and b^2, then fit it into the (a-b)(a+b). Hope you get what I mean! :) No prob!

Answer 10

Factor completely: 16x2 – 49
(16x – 49)(x + 1)
(16x – 49)(x – 1)
(4x – 7)(4x + 7)
(4x – 7)(4x – 7)

Answer 11

Same concept. Try this one yourself?

Answer 12

SO ALL I HAVE TO DO IS 16X^2-49

Answer 13

16x^2 is a^2. So a will be 4x. Then 49 is b^2. So b is 7. Therefore, (a-b)(a+b) will be (4x-7)(4x+7)

Answer 14

IM GOING TO PUT THE NEXT ONE BUT I WANT TO SEE IF I CAN GET THE ANSWER BY MYSELF

Answer 15

Factor completely: 18x2 – 98
2(3x – 7)(3x –7)
2(3x + 7)(3x – 7)
(6x – 14)(3x – 7)
(6x + 14)(3x + 7)

Answer 16

I DONT HAVE A CALCULATOR BUT IS IT THE SECOND ONE

Answer 17

YES!!! YOU GOT IT! Awesome! Continue practicin these questions and soon you'll be more familiar! :)