nie tylko wynik podrecznik do matmy zad 3 i 5 str 123 pilnie podaje 3 zadanie tresc 5 jest z rysunkiem wiec nie podam;( zad.3 usun nawiasy i zredukuj wyrazy podobne
a)5-(6a+8)=
b)(x+y)-(x-y)=
c)3x-(5x-9)=
d)(5m-3)-(10m-2)=
e)4ab-(-2a-3ab)-9a=
f)-(7x/2-5x+4)-(-4x)
7x/2- 7x do kwadratu
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a)5-(6a+8)= 5 – 6a -8 -5 = -6a - 8
b)(x+y)-(x-y)= x+y – x + y = 2y
c)3x-(5x-9)= 3x – 5x + 9 = -2x + 9
d)(5m-3)-(10m-2)= 5m – 3 -10m + 2 = - 5m -1
e)4ab-(-2a-3ab)-9a=4ab + 2a + 3ab = 7ab +2a
f)-(7x²- 5x+4)-(-4x) = - 7x² + 5x – 4 + 4x = -7x² +9x -4