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CBSE Class 10 Answered

If alpha and beta are zeros of p(x)=3x^2-12x+15. Find alpha^2+beta^2. 
Asked by krishashah09jhs.tl | 16 Apr, 2020, 02:53: PM
answered-by-expert Expert Answer

3x2-12x+15

We know that,
 
α+β = -b/a and αβ= c/a
→α+β =-(-12)/3= 4 and αβ= 15/3 = 5
We know that,
α2+β2 = (α+β)2 - 2αβ  = 42 - 2(5)= 16 - 10 = 6  
Answered by Yasmeen Khan | 16 Apr, 2020, 05:11: PM

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