Sub-Sūtra 3 of 13

Ādyamādyenāntyamantyena

First by the first, last by the last

Factorising quadratics quickly.

When to use

Quadratics ax² + bx + c.

How it works

Find two numbers whose product is a·c and sum is b. Use them to split the middle term.

Memory formula

Quadratic factors: first with first, last with last, middle must match.

Worked examples

Problem 1

Factor 6x² + 11x + 4

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