Q. Factor as the product of two binomials.x2−10x+21=
Identify the form: Identify the form of the quadratic trinomial. x2−10x+21 represents the form ax2+bx+c, where a=1, b=−10, and c=21.
Determine the factors: Determine the factors of the constant term, c, that add up to the coefficient of the x term, b.We need two numbers that multiply to 21 and add up to −10. The numbers that satisfy these conditions are −3 and −7, because (−3)×(−7)=21 and (−3)+(−7)=−10.
Write the factored form: Write the factored form of the expression x2−10x+21 using the numbers found in the previous step.The factored form will be (x−3)(x−7), because when we apply the distributive property (FOIL), we get x2−7x−3x+21, which simplifies to x2−10x+21.