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(x-2)(x 10)=13 a. x=3 b. x=8 c. x=10 d. x=11
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(x-2)(x 10)=13 a. x=3 b. x=8 c. x=10 d. x=11

User Deltakroneker
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( x - 2 ) ( x + 10 ) = 13
x ² + 10 x - 2 x - 20 = 13
x ² + 8 x - 33 = 0 (the quadratic equation ):
x_(12) = (-8\pm √(64 + 132) )/(2)= (-8\pm14)/(2)
x 1 = 3, x 2 = -11
Answer: a ) x = 3 ( one solution )
User Johannes Leimer
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