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ksuzette2000 ksuzette2000
  • 25-08-2016
  • Mathematics
Answered



Solve the system of equations.


y = x2 + 4

y = 5x

Verified Answer :

nobillionaireNobley
nobillionaireNobley nobillionaireNobley
  • 25-08-2016

y = x^2 + 4 . . . . . (1)
y = 5x . . . . . . . . .(2)

Putting (2) into (1) gives, 5x = x^2 + 4
x^2 - 5x + 4 = 0
(x - 1)(x - 4) = 0
x = 1 and x = 4
y = 5(1) and y = 5(4)
y = 5 and y = 20

Therefore solutions are: (1, 5) and (4, 20)

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