40+3y-y2 factorize.plz help me.
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-( y² - 3y - 40 ) = 0
y² - 3y - 40 = 0
y² - 8y + 5y -40 = 0
y( y - 8 ) + 5( y - 8 ) = 0
( y - 8 ) ( y + 5 ) = 0
=>
⠀⠀y - 8 = 0⠀⠀⠀⠀⠀⠀|⠀⠀⠀⠀y + 5 = 0
⠀⠀y = 8⠀⠀⠀⠀⠀⠀⠀⠀|⠀⠀⠀⠀y = -5
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