Higher Math 2nd Paper MCQ-Chittagong Board-2022

1. Roots of the equation $x^{2}-5 x+4=0$ are-

2.

The coordinates of the focus of the parabola is-

3. One root of the equation $a x^{2}+b x+c=$ 0 will be zero, when -

4. For the equation $x^{3}-2 x^{2}-2 x+4=0$

i. one root is 2

ii. two roots are irrational

iii. the product of three roots is 4

Which one is correet?

5. The value of $\operatorname{cosec}^{2}\left(\sec ^{-1} \sqrt{5}\right)$ is -