Question 1

What is the quadratic equation if the roots are 4 and 5?

Accepted Answer

x^2 -9x + 20 = 0

Answer

x^2 - 1x + 20 = 0

Answer

x^2 - 4x + 9 = 0

Answer

x^2 + 9x + 20 = 0

Question 2

If a quadratic equation has roots 7 and -3, what is the equation?

Accepted Answer

x^2 - 4x - 21 = 0

Answer

x^2 + 10x - 21 = 0

Answer

x^2 - 10x + 21 = 0

Answer

x^2 + 4x - 21 = 0

Question 3

What is the quadratic equation with roots -1 and 8?

Accepted Answer

x^2 -7 x - 8 = 0

Answer

x^2 - 9x + 8 = 0

Answer

x^2 + 7x + 8 = 0

Answer

x^2 + x - 8 = 0

Question 4

If the roots of a quadratic equation are 0 and 7, what is the equation?

Accepted Answer

x^2 - 7x = 0

Answer

x^2 - 14x = 0

Answer

x^2 - 7 = 0

Answer

x^2 + 7x = 0

Question 5

The roots of a quadratic equation are $x=-\frac{3}{5}\ and\ x=1$ . Form a quadratic equation of the form $ax^2+bx+c=0$ . Where a, b and c are integers. (2 mks) (KCSE 2017 pp2 qn 1)

Accepted Answer

$5x^2-2x-3$

Answer

$5x^2-2x-3$

Answer

$5x^2-2x-3$

Answer

$5x^2-2x-3$

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