Matematyka kl. 1 gim . wydawnictwo OPERON str.106 zad. 16. przyklady : a,b,c,d,e,f,g,h,i,j.
a) (a+2)² b) (b+4)² c) (2c+1)² d) (3d+7)² e) (e+1/3)² f) (a-3)² g) (b-6)² h) (4c-1)² i) (1/2d-4)² j) (e-0,7)²
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a) (a+2)²=(a+2)(a+2)=a² +2a+2a+4=a² +4a+4
b) (b+4)²=(b+4)(b+4)= b²+4b+4b+16=b²+8b+6
c) (2c+1)²=(2c+1)(2c+1)= 4c²+2c+2c+1=4c²+4c+1
d) (3d+7)²=(3d+7)(3d+7)=9d²+21d+21d+49=9d²+42d+49
e) (e+1/3)² =(e+1/3)(e+1/3)=e²+1/3e+1/3e+2/9
f) (a-3)²=(a-3)(a-3)=a²-3a-3a+9= a²-6a+9
g) (b-6)²=(b-6)(b-6)=b²-6b-6b+36=b²-12b+36
h) (4c-1)²=(4c-1)(4c-1)=16c²-4c-4c+1=16c²-8c+1
i) (1/2d-4)²=(1/2d-4)(1/2d-4)=1/4d²-2d-2d+16=1/4d²-4d+16
j) (e-0,7)²= (e-0,7)(e-0,7)=e²-0,7e-0,7e+0,49=e²-1,4e+0,49
mam nadzieje , ze dobrze :) proszę o naj:P