Algebra
Calculus
Trigonometry
Matrix
Question
Simplify the expression
x2−16x+63
Evaluate
(x−9)(x−7)
Apply the distributive property
x×x−x×7−9x−(−9×7)
Multiply the terms
x2−x×7−9x−(−9×7)
Use the commutative property to reorder the terms
x2−7x−9x−(−9×7)
Multiply the numbers
x2−7x−9x−(−63)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
x2−7x−9x+63
Solution
More Steps
Evaluate
−7x−9x
Collect like terms by calculating the sum or difference of their coefficients
(−7−9)x
Subtract the numbers
−16x
x2−16x+63
Show Solution
Find the roots
x1=7,x2=9
Evaluate
(x−9)(x−7)
To find the roots of the expression,set the expression equal to 0
(x−9)(x−7)=0
Separate the equation into 2 possible cases
x−9=0x−7=0
Solve the equation
More Steps
Evaluate
x−9=0
Move the constant to the right-hand side and change its sign
x=0+9
Removing 0 doesn't change the value,so remove it from the expression
x=9
x=9x−7=0
Solve the equation
More Steps
Evaluate
x−7=0
Move the constant to the right-hand side and change its sign
x=0+7
Removing 0 doesn't change the value,so remove it from the expression
x=7
x=9x=7
Solution
x1=7,x2=9
Show Solution