Math

49x^2 -1 = 0 solve by factoring

Asked by AnneS2 on 01 Apr 05:05

Last updated by anonymous on 03 Apr 18:06

1 Answers

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Answered by CherieS on 03 Apr 18:06

49x^2 -1 = 0

(7x )(7x ) ( +1)( -1)

(7x+1)(7x-1)=0

Check

(7x+1)(7x-1)

(7x)(7x) (7x)(-1) (1)(7x) (1)(-1)

49x^2 -7x +7x -1

49x^2 -1

Simplify:

7x+1=0

Solve:

7x+1=0

7x+1-1=0-1

7x=-1

7x/7=-1/7

x=-1/7

Simplify:

7x-1=0

Solve:

7x-1=0

7x-1+1=0+1

7x=1

7x/7=1/7

x=1/7