Q1_QUIZ #1_Quadratic Equation_ACCURACY

 Find the product. $\left(b+2\right)\ \left(b+9\right)$ 

•  $b^2+7b+18$  

•  $b^2-7b+18$  

•  $b^2+11b+18$  

•  $b^2-11b+18$  

Expand $\left(b-11\right)^2$  .

•  $b^2-11b+121$  

•  $b^2-22b+121$  

•  $b^2+11b-121$  

•  $b^2-22b-121$  

What is the product of $\left(y-4\right)\ and\ \left(y+4\right)$ ? 

•  $y^2+16$  

•  $y^2-16$  

•  $y^2+8y-16$  

•  $y^2-8y-16$  

Which one is the quadratic term in the equation $m^2+15m+50=0$  ?

•  $m^2$  

•  $50$  

•  $15m$  

•  $0$  

 It is a polynomial equation of degree two that can be written in the form $ax^2+bx+c=0$  , where a, b and c are real numbers and  $a\ne0$ .

• Linear equation

• Linear Inequality

• Quadratic equation

• Quadratic Inequality

The quadratic equation $3x=x^2-10$  in the form  $ax^2+bx+c=0\$  is ___________.

•  $x^2+3x-10=0$  

•  $x^2-3x-10=0$  

•  $x^2+3x+10=0$  

•  $-x^2-3x+10=0$  

One of the roots of $a^2=144$  is -12. What is the other root?

• 12

• 11

• -11

• 14

What are the roots of the quadratic equation $2x^2-50=0$  ?

•  $5\ and\ -5$  

•  $10\ and\ -10$  

•  $\frac{1}{2\ }\ and\ -\frac{1}{2}$  

•  $\frac{1}{5\ }\ and\ -\frac{1}{5}$  

Which of the following can be solved easily by extracting the square roots?

• $x^2+7x+12=0$

• $2w^2+7w-3=0$

• $4t^2-9=0$

• $3v^2+2v-8=0$

How many  solutions do you have if  $k>0$   in the quadratic equation $x^2=k$  ?

• No real solution

• two real solutions

• one solution