Zapisz w postaci wyrażeń algebraicznych pola i obwody figur na zdięciu.
Proszę o napisanie obliczeń
wik8947201
A) 2/3a+1/3a+a+3/4b+1/4b+b=2a+2b P=ab-2/3a*1/4b=ab-1/6ab=5/6ab b) b+a+b+b+a+b+b+a+b+b+b+a=4a+8b P=(a+b)²+ab+ab=a²+2ab+b²+2ab=a²+4ab+b² c) 4(x+y)=4x+4y P=(y+x)²-2x²=y²+2xy+x²-2x²=y²-x²+2xy d) 2(2a+5)+2(2a+3)+2a=4a+10+4a+6+2a=10a+16 P=2a+3*5+a(2a+3)+a²=a²+2a+15+2a²+3a=3a²+5a+15
2/3a+1/3a+a+3/4b+1/4b+b=2a+2b
P=ab-2/3a*1/4b=ab-1/6ab=5/6ab
b)
b+a+b+b+a+b+b+a+b+b+b+a=4a+8b
P=(a+b)²+ab+ab=a²+2ab+b²+2ab=a²+4ab+b²
c)
4(x+y)=4x+4y
P=(y+x)²-2x²=y²+2xy+x²-2x²=y²-x²+2xy
d)
2(2a+5)+2(2a+3)+2a=4a+10+4a+6+2a=10a+16
P=2a+3*5+a(2a+3)+a²=a²+2a+15+2a²+3a=3a²+5a+15