Question

6x²+6x-7 solve this

Answer 1

Solution:

Completing the square method:

x

2

+6x=7

Adding [

2

1

×coefficient ofx]

2

both sides we get,

x

2

+6x+[

2

1

×6]

2

=7+[

2

1

×6]

2

or, x

2

+6x+3

2

=7+3

2

or, (x+3)

2

=16

or, x+3=

16

or, x+3=±4

or, x=4−3 or x=−4−3

or, x=1 or x=−7

Answer 2

Answer:

(6) square - 4×6×7

36-252=216