pandalavender2003 pandalavender2003

14-01-2020
Mathematics

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2x²-3x-15=5 using the factoring method

Respuesta :

sam4040 sam4040

20-01-2020

Answer:

[tex]x=4,\ \frac{-5}{2}[/tex]

Step-by-step explanation:

[tex]2x^2-3x-15=5\\2x^2-3x-15-5=0\\2x^2-3x-20=0\\\\2x^2-8x+5x-20=0\\2x(x-4)+5(x-4)=0\\(x-4)(2x+5)=0\\if\ (x-4)=0\\x=4\\if\ (2x+5)=0\\2x=-5\\x=\frac{-5}{2}[/tex]

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