jaki jednomian należy wpisać na miejsce kropek? Oblicz.
a) (x+3y)^2-...=x^2+5xy+9y^2
b) (b+1)^2 =...+(b-1)^2
c) a^2 +36+...=(a-6)^2
d) 4x(x+3y)+...=(2x+3y)^2
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a)(x+3y)^2-z=x^2+5xy+9y^2
x^2+6xy+9y^2-z=x^2+5xy+9y^2
z=xy
b)(b+1)^2=a+(b-1)^2
b^2+2b+1=a+b^2-2b+1
4b+a
c)a^2+36+b=(a-6)^2
a^2+36+b=a^2-12a+36
b=-12a
d)4x(x+3y)+z=(2x+3y)^2
4x^2+12xy+z=4x^2+12xy+9y^2
z=9y^2