week 13 G10

What is the SUM of the roots of quadratic equation x² + 13x + 42 = 0?

• -42

• -13

• 13

• 42

What is the PRODUCT of the roots of x² – 15x + 26 = 0?

• -26

• -15

• 15

• 26

The quadratic equation whose two roots are: 1 and 2 is .............

• $x^2-3\ x\ +\ 2$

• $x^2+3x\ +2$

• $x^2\ -3x\ -2$

• $x^2+3x-2$

 If L and M are the two roots of the equation :  $x^2\ -3x\ +1=0$  then the equation  whose roots are : L + M and LM  is ..............

•  $x^2+4x\ +3\ =\ 0$  

•  $x^2\ -3x+4\ =\ 0$  

•  $x^2-4x+3\ =\ 0$  

•  $x^3-4x^2+3x$  

If  $l\ ,\ l^2$  are two roots of equation  $2\ x^2\ +\ b\ x\ +54\ =\ 0$  then b = .........

• 36

• -24

• 27

• -12

If L and M are the two roots of the equation   $𝑥^2-8x+5=0$    then form the quadratic equation whose roots are   $\frac{1}{l},\ \frac{1}{m}$  is ..........

•  $𝒙^2−8x+1=0$  

•  $5𝒙^2−8x+1=0$  

•  $5𝒙^2−1x+8=0$  

•  $5𝒙^2+8x+1=0$  

The quadratic equation in which each of the two roots is twice one of the roots of the equation   $x^2–8x+5=0$  is ...................................... 

•  $x^2–\ 16\ x+20=0$  

•  $2x^2–16x+20=0$  

•  $x^2+16x+20=0$  

•  $2x^2–16x-20=0$  

Solve:

2x² + 5x ≥ 12 , then find the interval notation of the inequality.

• [-4, 1.5]

• (−∞, -4) U (1.5, ∞)

• (−∞, -4] U [1.5, ∞)

• no solution

Tags

CCSS.HSA.APR.B.3

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

Which of the following is the interval notation of x² - x - 12 < 0?

• [ 4, 3]

• (-4, -3]

• (-3, 4)

• [-3, 4]

Tags

CCSS.HSA.APR.B.3

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

 $\tan\ \left(180\degree\ +\ \theta\right)\ =\ ..........$  

•  $\ -\ \tan\ \theta$  

•  $\tan\ \theta$  

•  $\sin\ \theta$  

•  $\cos\ \theta$