Question

(24-x)(15+x)=0

Answer 1

\(\Rightarrow\left[{}\begin{matrix}24-x=0\\15+x=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=24\\x=-15\end{matrix}\right.\)

Answer 2

(−𝑥+24)(15+𝑥)=0

(−𝑥+24)(𝑥+15)=0

(𝑥+15)(−𝑥)+24(𝑥+15)=0

−(𝑥+15)𝑥+24(𝑥+15)=0

−(𝑥\(^2\)+15𝑥)+24(𝑥+15)=0

𝑥=24

𝑥=−15

Answer 3

Để (24-x)(15 +x) = 0 

⇒ 24 - x = 0 ; 15 + x = 0

⇒ x = { 24 ; -15 }

 

Answer 4

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