rayrayrabs3 rayrayrabs3

19-05-2020
Mathematics

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What is a solution to the equation (x-2)(x+5)=18

Respuesta :

wegnerkolmp2741o wegnerkolmp2741o

19-05-2020

Answer:

x= -7 x=3

Step-by-step explanation:

(x-2)(x+5)=18

FOIL

x^2 +5x -2x-10 = 18

Subtract 18 from each side

x^2 +5x -2x-10-18 = 18-18

x^2 +3x -28 =0

Factor

What 2 numbers multiply to -28 and add to 3

7*-4 = -28

7-4 =3

(x+7) (x-3) =0

Using the zero product property

x+7 =0 x-3 =0

x= -7 x=3

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