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Q.

How do you find the factor 3x2 -8x+15?

Sub Grade: 10

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a

8±10.776

b

4±10.776

c

6±10.776

d

2±10.776 

answer is A.

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Detailed Solution

Given equation 3x2 -8x+15
Quardic formula=-b±b2- 4 ac2a
Here a=3, b= -8 ,c= +15
⇒ -(-8)±64- 1806
⇒  8±-1166
⇒  8±10.776
∴  the root of factor is 8+10.776 and 8-10.776
 Type Exam: CBSE
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