The algebra book was an even more scholarly work and took the subject up to the solution of equations of degree four. He tried, with great success, to show why the introduction of algebraic notation was necessary and inevitable.
Algebra ang libro ay isang mas matalino sa trabaho at kinuha ang mga paksa hanggang sa ang solusyon ng equation ng mga apat na antas. He tried, na may mahusay na tagumpay, upang ipakita kung bakit ang pagpapakilala ng algebraic notasyon ay kailangan at hindi maiwasan.