Negative B, negative B, plus or minus the square root, plus or minus the square root, of B squared minus 4 A C, B squared minus 4 A C, all over 2 A, all over 2 A.

Explanation

This is a memory technique to help you remember the quadratic formula. Sung to the tune of "Frère Jacques," this memorization trick helps students solve any equation in the form ax² + bx + c = 0 without having to memorize the formula from scratch.

Example: solve x² − 5x + 6 = 0. Here a = 1, b = −5, c = 6.

• x = (−b ± √(b² − 4ac)) / 2a
• x = (5 ± √(25 − 24)) / 2
• x = (5 ± 1) / 2

That gives x = 3 or x = 2.