Introduction Mathematics formulas help students solve problems faster and more accurately. This guide provides some of the most important formulas students should memorize. Algebra Difference of Squares a2−b2=(a+b)(a−b)a^2-b^2=(a+b)(a-b)a2−b2=(a+b)(a−b) aaa bbb a2−b2=(a−b)(a+b)a^2-b^2=(a-b)(a+b)a2−b2=(a−b)(a+b) 92−42=(9−4)(9+4)=659^2-4^2=(9-4)(9+4)=6592−42=(9−4)(9+4)=65aba + ba – b Quadratic Formula x=−b±b2−4ac2ax=\frac{-b\pm\sqrt{b^2-4ac}}{2a}x=2a−b±b2−4ac​​ aaa bbb ccc x=−b±b2−4ac2a=0±162≈−2, 2x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{0\pm\sqrt{16}}{2}\approx -2,\ 2x=2a−b±b2−4ac​​=20±16​​≈−2, 2 Geometry Area of a Circle A=πr2A=\pi r^2A=πr2 rrr A=πr2≈28.27A = […]