Binomische Formeln/Gleichungen.

Question

a) (x+7)hoch2=xhoch2
b) (a-8)hoch2=ahoch2
c) (2y+4)hoch2=4yhoch2+32

Answer 1

Hi,

a) (x+7)^2 = x^2

x^2+14x+49 = x^2   |-x^2

14x+49 = 0

14x = -49     |:14

x = -7/2


b) (a-8)^2 = a^2

a^2-16a+64 = a^2   |-a^2

-16a+64 = 0             |+16a

16a = 64

a = 4


c) (2y+4)^2 = 4y^2+32

4y^2+16y+16 = 4y^2+32  |-4y^2-16

16y = 16

y = 1


Grüße

Comments

Gerne :)    .