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Beliebt Algebra >

completesquare x^2+8x-7

Lösung

vervollständige das quadrat

x^{2} + 8 x - 7

Lösung

(x + 4)^{2} - 23

Schritte zur Lösung

x^{2} + 8 x - 7

Schreibe

x^{2} + 8 x - 7

in dieser Form:

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

2 a = 8 : a = 4

Addiere und subtrahiere

4^{2}

x^{2} + 8 x - 7 + 4^{2} - 4^{2}

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

x^{2} + 8 x + 4^{2} = (x + 4)^{2}

(x + 4)^{2} - 7 - 4^{2}

Vereinfache

(x + 4)^{2} - 23

Graph

Beliebte Beispiele

- 3 x^{2} + 3 x - 1 = 0

- 2 x^{2} + 11 x - 12 = 0

solvefor vw^2+y=x,w

so l v e f or v w^{2} + y = x, w

14x^2+33x=3x^2+3x+1

14 x^{2} + 33 x = 3 x^{2} + 3 x + 1

(x+2)^2-3=(2x-5)/3

(x + 2)^{2} - 3 = \frac{2 x - 5}{3}