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Beliebt Algebra >

completesquare x^2+2x-18

Lösung

vervollständige das quadrat

x^{2} + 2 x - 18

Lösung

(x + 1)^{2} - 19

Schritte zur Lösung

x^{2} + 2 x - 18

Schreibe

x^{2} + 2 x - 18

in dieser Form:

x^{2} + 2 a x + a^{2}

2 a = 2 : a = 1

Addiere und subtrahiere

1^{2}

x^{2} + 2 x - 18 + 1^{2} - 1^{2}

x^{2} + 2 a x + a^{2} = (x + a)^{2}

x^{2} + 2 x + 1^{2} = (x + 1)^{2}

(x + 1)^{2} - 18 - 1^{2}

Vereinfache

(x + 1)^{2} - 19

Graph

Beliebte Beispiele

x^2(-8b+7)=-8b+6

x^{2} (- 8 b + 7) = - 8 b + 6

solvefor x,x(x-5)=0

so l v e f or x, x (x - 5) = 0

10 n^{2} - 3 n - 1 = 0

solvefor t,f(t-2)=5t^2-7t+3

so l v e f or t, f (t - 2) = 5 t^{2} - 7 t + 3

4x^2+2x-14.44=0

4 x^{2} + 2 x - 14.44 = 0