Question Simplify the expression 49x2−14x+1 Evaluate (7x−1)2Use (a−b)2=a2−2ab+b2 to expand the expression (7x)2−2×7x×1+12Solution 49x2−14x+1 Show Solution Find the roots x=71Alternative Form x=0.1˙42857˙ Evaluate (7x−1)2To find the roots of the expression,set the expression equal to 0 (7x−1)2=0The only way a power can be 0 is when the base equals 0 7x−1=0Move the constant to the right-hand side and change its sign 7x=0+1Removing 0 doesn't change the value,so remove it from the expression 7x=1Divide both sides 77x=71Solution x=71Alternative Form x=0.1˙42857˙ Show Solution
Algebra
Calculus
Trigonometry
Matrix Algebra Calculus Trigonometry Matrix