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4.01 Quadratic equations

Interactive practice questions

Which of the following are quadratic equations?

Select all correct answers.

$y=5x^2-6x$y=5x26x

A

$y=x^4+x^2+7$y=x4+x2+7

B

$y=1+x^3$y=1+x3

C

$y=4+8x+2x^2$y=4+8x+2x2

D

$y=x^2+2+\frac{6}{x}$y=x2+2+6x

E

$y=-7x^2+3$y=7x2+3

F
Easy
< 1min

Consider the parabola defined by the equation $y=x^2+4$y=x2+4.

Easy
< 1min

Consider the parabola defined by the equation $y=-x^2+3$y=x2+3.

Easy
< 1min

Solve $x^2=25$x2=25 for $x$x.

Enter each solution on the same line, separated by a comma.

Easy
< 1min
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VCMNA341

Solve simple quadratic equations using a range of strategies.

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