CLASS X MATHS...
1.If α and β are zeroes of the polynomial x²-2x-15 then form a quadratic polynomial whose zeroes 2α and 2β.
2.If the sum of the zeroes of the polynomial f(t)=kt²+2t+3k is equal to the product then the value of k is________?
3.Find the value of a for which (x-a) is a factor of f(x) =-x³+ax²+3x+9.
4.If x-a/b+a + x-b/c+a + x-c/a+b = 3 then the value of x is______?

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Answers

  • Amd
  • Ambitious
2015-06-03T11:28:17+05:30
First we will factorize by middle term factorisation-
x²·5x+3x-15
=x(x-5)-3(x-5)
=(x-3)(x-5)
So,α=3,β=5
k[x²-Sx+p]
=x²-16x+60
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