Question Simplify the expression 21x2−27x Evaluate 21x(x−7)Apply the distributive property 21x×x−21x×7Multiply the terms 21x2−21x×7Solution 21x2−27x Show Solution Find the roots x1=0,x2=7 Evaluate 21x(x−7)To find the roots of the expression,set the expression equal to 0 21x(x−7)=0Elimination the left coefficient x(x−7)=0Separate the equation into 2 possible cases x=0x−7=0Solve the equation More Steps Evaluate x−7=0Move the constant to the right-hand side and change its sign x=0+7Removing 0 doesn't change the value,so remove it from the expression x=7 x=0x=7Solution x1=0,x2=7 Show Solution
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