Question Simplify the expression 4r2−4r+1 Evaluate (2r−1)2Use (a−b)2=a2−2ab+b2 to expand the expression (2r)2−2×2r×1+12Solution 4r2−4r+1 Show Solution Find the roots r=21Alternative Form r=0.5 Evaluate (2r−1)2To find the roots of the expression,set the expression equal to 0 (2r−1)2=0The only way a power can be 0 is when the base equals 0 2r−1=0Move the constant to the right-hand side and change its sign 2r=0+1Removing 0 doesn't change the value,so remove it from the expression 2r=1Divide both sides 22r=21Solution r=21Alternative Form r=0.5 Show Solution
Algebra
Calculus
Trigonometry
Matrix Algebra Calculus Trigonometry Matrix