find the quadratic equation whose roots exceed the roots of the quadratic equation xsqiate
Answers
Answered by
6
Let f(x) = x² - 2x + 3.
Suppose a and b are the roots, so f(a) = f(b) = 0.
We want a polynomial g(x) that has roots a+2 and b+2.
So we want
g(a+2) = g(b+2) = 0. ... (*)
Take g(x) = f(x-2).
Then g(a+2) = f( (a+2) - 2 ) = f(a) = 0
and g(b+2) = f( (b+2) - 2 ) = f(b) = 0.
So this is the quadratic that satisfies (*).
The quadratic that we want is then
g(x) = f(x-2) = (x-2)² - 2(x-2) + 3
= x² - 4x + 4 - 2x + 4 + 3
= x² - 6x + 11
Similar questions