First Quarter Long Examination in Math 9: Part 1

Which among the following is the quadratic formula?

• $D=b^2-4ac$

• $x\ =\ \frac{-b\pm\sqrt{b^2+4ac}}{2a}$

• $x=\frac{-b\pm b^2-4ac}{2a}$

• $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Which among the following is a quadratic equation?

• $x^2-6x+7=0$

• $3x^3-7=0$

• 2x - 3 = 0

• x - 5 = 0

What is the degree of a quadratic equation?

• 1

• 2

• 3

• 4

Which among the following quadratic equations is in standard form?

• $x^2-9x=1$

• $2x^2-2=10x$

• $-x^2+7x-3=0$

• $x^2=0$

Complete the statement: A quadratic equation has __________ roots.

• 1

• 2

• 3

• 4

Write the given quadratic equation into its standard form:

 $2x=3-5x^2$  

•  $5x^2-2x=3$  

•  $-5x^2-2x-3=0$  

•  $5x^2+2x-3=0$  

•  $-5x^2-2x+3=0$  

Identify the quadratic term in the given quadratic equation:

 $3x^2=8x-3$  

•  $3x^2$  

• -8x

• 3

• none

Identify the a, b, and c of the given quadratic equation in standard form:

 $5x-7x^2-9=0$  

• a = 7, b = 5, c = 9

• a = -7, b = 5, c = -9

• a = 7, b = -5, c = 9

• a = -7, b = -5, c = 9

Find the roots of

 $x^2-100\ =\ 0$  

• x = 100, x = -100

• x = 50, x = -50

• x = 25, x = -25

• x = 10, x = -10

What is the standard form of quadratic equation?

• $ax^2+bx+c$

• $ax^2+bx+c>0$

• $ax^2+bx+c\ge0$

• $ax^2+bx+c=0$