Question

solve by completing the square method. ..plz ans. It is urgent​

Answer 1

2y ² + 9y+10=0

divide by 2

we get

y² + 9/2y+5=0

y ² +9/2y = -5

TT=(1/2×coff. of x)

=(1/2×9/2)² =(9/4)² = 81/16

add-on both side

y ² + 9/2y +81/16 = -5+81/16

[y+9/4] ² = -80+81/16

taking √ on both side

y + 9/4 = + or - 1/4

therefore

y+9/4=-1/4

y=-1/4-9/4

y=10/4

y=5/2

or

y+9/4=1/4

y=1/4-9/4

y=8/4

y=2

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