Question

Answer 1

`@` `\text {Ans}`

`\downarrow`

`b)`

`15x^4y^3z^2 \div (-3x^3 y^3 z)`

`= 15 \div (-3) * (x^4 \div x^3) * (y^3 \div y^3) * (z^2 \div z)`

`= -5xz`

Thay `x = -2; z = 10`

`-5 * (-2) * 10`

`= 10 * 10 = 100`

Answer 2

\(A=\dfrac{-15x^4y^3z^2}{3x^3y^3z}=-5xz\)

Khi x=-2 và z=10 thì A=-5*(-2)*10=100