Question

y² - 4x = 0
2x + y = 4

answer this using substitution method ​

Answer 1

Step-by-step explanation:

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X is equals to 1

Y equal to 2

Answer 2

Answer:

x=1 y= 2

x=4 y = -4

Step-by-step explanation:

y² - 4x =0

y² = 4x

y²/ 4 = x

2x + y = 4

putting value of x from above

2y²/4 + y = 4

2y²+4y/4 = 4

2y² + 4y = 16

divide the whole equation by 2

y²+ 2y = 8

y² + 2y -8 =0

y² + 4y - 2y - 8 =0

y( y+4) -2 (y +4) =0

(y-2) (y+4) = 0

y =2, y = -4

when , y = 2 then x = 2²/4= 1

when y = -4 then x = -4²/4 = 16/4= 4