Question

Melengkapkan kuadrat sempurna
a.x²+6x+4=0
b.x²+7x+10=0

tolong bantu

Answer 1

A. x²+6x+4= (x+3)²-2
b. x²+7x+10= (x+ 7/2 )²- 9/4

Answer 2

x² + 6x + 4 = 0

x² + 6x = -4

x² + 6x + 9 = 5

(x + 3)² = 5

x + 3 = ±√5

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x² + 7x + 10 = 0

x² + 7x = -10

x² + 7x + 49/4 = 9/4

(x + 7/2)² = 9/4

x + 7/2 = ±√9/4

x + 7/2 = 3/2           x + 7/2 = -3/2

x = -2                               x = -5