Question

12. Simplify: (5x2 - 6x?) + (2x2 - 8x?)
(A) 2x
(B) - 2x
(C) 11 x
(D) - 11x
(E) None of these​

Answer 1

Answer:

ANSWER

The given expression

x

2

+6x+8

x

2

−4

−

x

2

−x−20

x

2

−11x+30

can be simplified as shown below:

=

x

2

+6x+8

x

2

−4

−

x

2

−x−20

x

2

−11x+30

=

x

2

+4x+2x+8

x

2

−2

2

−

x

2

−5x+4x−20

x

2

−5x−6x+30

=

x(x+4)+2(x+4)

(x−2)(x+2)

−

x(x−5)+4(x−5)

x(x−5)−6(x−5)

(∵a

2

−b

2

=(a−b)(a+b))

=

(x+2)(x+4)

(x−2)(x+2)

−

(x+4)(x−5)

(x−6)(x−5)

=

x+4

x−2

−

x+4

x−6

=

x+4

(x−2)−(x−6)

=

x+4

x−2−x+6

=

x+4

4

Hence,

x

2

+6x+8

x

2

−4

−

x

2

−x−20

x

2

−11x+30

=

x+4

4

Answer 2

Answer:

(E) NONE OF THESE

Step-by-step explanation:

5×2 -6x + 2×2 - 8x

= 10 -6x + 4 - 8x

= 14 - 14x

NOW,,PLZZZ MARK ME AS THE BRAINLIEST!!!

;)