254−m
254−2m
254+m
254+2m
Correct answer is A
2x2−5x+m=0
a=2,b=−5,c=m
α+β=−ba=52
αβ=ca=m2
α2+β2=(α+β)2−2αβ
= (52)2−2(m2)
= 254−m
Express x2+x+4(1−x)(x2+1) in partial fractions....
Given that f(x)=3x2−12x+12 and f(x)=3, find the values of x....
The gradient of point P on the curve y=3x2−x+3 is 5. Find the coordinates of P....
The equation of a circle is 3x2+3y2+6x−12y+6=0. Find its radius...
Find the coordinates of the point on the curve y=x2+4x−2, where the gradient is zero....
A linear transformation is defined by T: (x, y) → (-x + y, -4y). Find the image, Q`, of Q(-3, ...
If f(x)=2x2−3x−1, find the value of x for which f(x) is minimum....