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  • Quadratic Equations, Inequalities, and Functions
  • Solving Quadratic Equations
  • Solving quadratic equations using the quadratic formula

Solving quadratic equations using the quadratic formula

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  • Question 1:
    1 pts
    		For 2x2−3x−1=02x^2-3x-1=0 if a=2a=2, b=−3b=-3 then c=?c = ?

    11

    −1-1

    33

    22

  • Question 2:
    1 pts
    		For x2−9=0x^2-9=0 if c=−9c=-9, than b=?b= ?

    11

    −1-1

    00

    99

  • Question 3:
    1 pts
    		For 2x2−9=x2x^2-9=x if a=2a=2, c=−9c =-9 than b=?b=?

    11

    −1-1

    22

    −2-2

  • Question 4:
    1 pts
    		easy : For −12x2+x=−4-\frac{1}{2}x^2+x=-4 if a=−12,b=1a=-\frac12 , b = 1 than c=?c= ?

    22

    −2-2

    44

    −4-4

  • Question 5:
    2 pts
    		For quadratic equation −x2=10-x^2=10 choose the correct substitution for a, b and c in the standard form ax2+bx+c=0ax^2+bx+c=0.
    a=−1,b=0,c=10a=-1 , b=0 , c=10
    a=1,b=0,c=−10a=1 , b=0 , c=-10
    a=−1,b=0,c=−10a=-1 , b=0 , c=-10
  • Question 6:
    2 pts
    		Solve a2+4a−5=0a^2+4a-5=0 by using the quadratic formula.

    a=1,a=−5a = 1 , a = -5

    a=1,a=5a = 1 , a = 5

    a=−1,a=4a = -1 , a = 4

    a=1,a=4a = 1 , a = 4

  • Question 7:
    2 pts
    		Solve 2m2−m=12m^2-m=1 by using the quadratic formula.
    m=2,m=−1/2m=2 , m=-1/2
    m=−1,m=−2m=-1 , m=-2
    m=1,m=−1/2m=1 , m=-1/2
  • Question 8:
    3 pts
    		Solve p(p+1)−2(p−1)=2p(p+1)-2(p-1)=2 by using the quadratic formula.
    p=0,p=−1p=0 , p=-1
    p=1+i,p=1−ip=1+i , p=1-i
    p=i,p=−ip=i , p=-i
    p=0,p=1p=0 , p=1
  • Question 9:
    3 pts
    		Solve 1/2m2+m+1=01/2m^2+m+1=0 by using the quadratic formula.
    m=1,m=−1m=1 , m=-1
    m=i,m=−im=i , m=-i
    m=1+i,m=1−im=1+i , m=1-i
    m=2+i,m=2−im=2+i , m=2-i
  • Question 10:
    3 pts
    		Solve 3x2−12x+1=03x^2-\sqrt{12}x+1=0 by using the quadratic formula.
    3\sqrt{3}
    33\frac{\sqrt{3}}{3}
    232\sqrt{3}
    32\frac{\sqrt{3}}{2}

Solving quadratic equations

Graphing function and discriminant