middle term spliting 12x2-2x-4
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2
Answer:
1/2 and -7/2
Step-by-step explanation:
7−12x−4x
2
=0
⇒4x
2
+12x−7=0
⇒4x
2
+14x−2x−7=0
⇒2x(2x+7)−7(2x+7)=0
⇒(2x−1)(2x+7)=0
∴x=
2
1
,
2
−7
.
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