91Ó°ÊÓ

Q59.

Page 478

Solve the equation $r^2-3r=4$ by factoring.

Q6.

Page 482

Find the LCM of set of polynomials $x^2-2x,x^2-4$.

Q6.

Page 476

Simplify the expression $\frac{6y^3-9y^2}{2y^2+5y-12}$.

Q60.

Page 478

Solve the equation $18u^2-3u=1$ by factoring.

Q61.

Page 478

Solve the equation $d^2-5d=0$ by factoring.

Q62.

Page 478

Earth is an average $1.496×{10}^8$ kilometres from the Sun. If light travels $3×{10}^5$ kilometres per second, how long does it take sunlight to reach Earth?

Q63.

Page 478

Solve the equation $\left|2x+7\right|+5=0$.

Q64.

Page 478

Solve the equation$5\left|3x−4\right|=x+1$.

Q65.

Page 478

Solve the equation$\frac{2}{3}+x=−\frac{4}{9}$.

Q66.

Page 478

Solve the equation $x+\frac{5}{8}=-\frac{5}{6}$.