12. Simplify: (5x2 - 6x?) + (2x2 - 8x?)
(A) 2x
(B) - 2x
(C) 11 x
(D) - 11x
(E) None of these
Answers
Answered by
0
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
Answered by
0
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!!!
;)
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