49x^2 - 144 = 0 solve by factoring

Asked by AnneS2 on 01 Apr 05:04

Last updated by anonymous on 03 Apr 18:15

Answered by CherieS on 03 Apr 18:15

49x^2 - 144 = 0

(7x )(7x ) ( +12)( -12)

(7x+12)(7x-12)

Check:

(7x+12)(7x-12)

(7x)(7x) (7x)(-12) (12)(7x) (12)(-12)

49x^2 -84x +84x -144

49 x62 -144

Simplify:

(7x+12)=0

Solve:

(7x+12)=0

7x+12-12=0-12

7x=-12

7x/7=-12/7

x=-12/7

Simplify:

(7x-12)=0

Solve:

(7x-12)=0

7x-12+12=0+12

7x=12

7x/7=12/7

x=12/7