Montrer que (x-20)(x+45)=x^2+25x-900.... Pergunta de ideia deNaomiDvl04

April 2019 1 12 Report

Montrer que (x-20)(x+45)=x^2+25x-900

Leila06 Il faut juste développer ..
(X-20)(X+45)= X x X + X x 45 -20 x X -20 x 45
= X^2 + 45X - 20X - 900
= X^2 + 25X - 900

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