Question Simplify the expression 90z2−90z3 Evaluate z2×90−z3×90Use the commutative property to reorder the terms 90z2−z3×90Solution 90z2−90z3 Show Solution Factor the expression 90z2(1−z) Evaluate z2×90−z3×90Use the commutative property to reorder the terms 90z2−z3×90Use the commutative property to reorder the terms 90z2−90z3Rewrite the expression 90z2−90z2×zSolution 90z2(1−z) Show Solution Find the roots z1=0,z2=1 Evaluate z2×90−z3×90To find the roots of the expression,set the expression equal to 0 z2×90−z3×90=0Use the commutative property to reorder the terms 90z2−z3×90=0Use the commutative property to reorder the terms 90z2−90z3=0Factor the expression 90z2(1−z)=0Divide both sides z2(1−z)=0Separate the equation into 2 possible cases z2=01−z=0The only way a power can be 0 is when the base equals 0 z=01−z=0Solve the equation More Steps Evaluate 1−z=0Move the constant to the right-hand side and change its sign −z=0−1Removing 0 doesn't change the value,so remove it from the expression −z=−1Change the signs on both sides of the equation z=1 z=0z=1Solution z1=0,z2=1 Show Solution