8.04 Solve quadratics using the quadratic formula
Adaptive
Worksheet
Interactive practice questions
To solve $x^2-x=2$x2−x=2, Emma substitutes $a=1$a=1 into the quadratic formula. What value of $c$c should she substitute into the quadratic formula?
$2$2
A
$-1$−1
B
$-2$−2
C
$2$2
D
Medium
< 1min
The standard form of a quadratic equation is $ax^2+bx+c=0$ax2+bx+c=0.
Identify the values of $a$a, $b$b and $c$c in the quadratic equation $x^2-3x-4=0$x2−3x−4=0 with $a>0$a>0.
Medium
< 1min
The standard form of a quadratic equation is $ax^2+bx+c=0$ax2+bx+c=0.
Identify the values of $a$a, $b$b and $c$c in the quadratic equation $2x^2+9x=0$2x2+9x=0 with $a>0$a>0.
Medium
< 1min
The standard form of a quadratic equation is $ax^2+bx+c=0$ax2+bx+c=0.
Identify the values of $a$a, $b$b and $c$c in the quadratic equation $3x^2-8x+2=9x-7$3x2−8x+2=9x−7 with $a>0$a>0.
Medium
1min
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