ANATOMY

Detailed explanation-1: -To find where the function intersects the x-axis, set f(x)=0 and solve the equation for x. If the function is a linear function of degree 1, f(x)=mx+b and the x-intercept is the root of the equation, found by solving the equation for x.

Detailed explanation-2: -Step 1 Divide all terms by a (the coefficient of x2). Step 2 Move the number term (c/a) to the right side of the equation. Step 3 Complete the square on the left side of the equation and balance this by adding the same value to the right side of the equation.

Detailed explanation-3: -⇒ x 2-7 x + 12 = x 2-3 x-4 x-12. ⇒ x 2-7 x + 12 = x x-3-4 x-3 [ ∵ ab-ac = a ( b-c ) ] ⇒ x 2-7 x + 12 = x-3 x-4.