Question

Q4) For what value of a, is -4a zero of the polynomial p(x) = x²- x- (2a +2)?
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Answer 1

Answer:

(i) In hilly and mountainous regions, people build diversion channels like 'gul' or 'kul' in Western Himalaya for agriculture. (ii) Roof-top rainwater harvesting was commonly practised to store drinking water, particularly in Rajasthan. (iii) In West Bengal, people develop inundation channels to irrigate their fields

Answer 2

Answer:

Given polynomial p(x)=2x  

2

−3x+7a is zero polynomial if x is 2

Replace x by 2 we get

∴2(2)  

2

−3(2)+7a=0

⇒2×4−3×2+7a=0

⇒8−6+7a=0

⇒2+7a=0

Add -2 both sides we get

2+7a−2=0−2

⇒7a=−2

Divided by 7 both side we get

a=−  

7

2

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So a=−  

7

2

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Step-by-step explanation:

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