Equations

Hong Kong

Stage 4 - Stage 5

Solve $8x^{-2}-6x^{-1}+1=0$8`x`−2−6`x`−1+1=0.

Easy

3min

Solve $-15x^{-2}+4x^{-1}+3=0$−15`x`−2+4`x`−1+3=0. Write all solutions on the same line, separated by a comma.

Easy

5min

Solve $2x^{-2}+x^{-1}=6$2`x`−2+`x`−1=6.

Easy

2min

Solve $\frac{y^{\frac{5}{7}}-y^{-\frac{2}{7}}}{y}=0$`y`57−`y`−27`y`=0.

Easy

3min

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