Equations

Hong Kong

Stage 4 - Stage 5

Solve $\sqrt{\sqrt{x-5}}=2$√√`x`−5=2.

Be sure to exclude any extraneous solutions.

Easy

Less than a minute

Solve $\sqrt{\sqrt{x}+9}=4$√√`x`+9=4.

Be sure to exclude any extraneous solutions.

Solve $\sqrt{7-\sqrt{x}}+2=4$√7−√`x`+2=4.

Be sure to exclude any extraneous solutions.

Solve $2\sqrt{3\sqrt{x}-2}=8$2√3√`x`−2=8.

Be sure to exclude any extraneous solutions.

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