zapisz wyrazenia w najprostszej postaci. a)-2a+b-a-2b+3a= b)-ab-b do kwadratu +3ab-2ab-3b do kwadratu c)2,1a do kwadratu b-0,4a-1,1a do kwadratu b +0,4a do kwadratu= d)5x+(2x-7)= e)-5x+(-2+4x)= f-5x-(-2x-7)= f)-5x-(-2x-7)= g)-8y-(-7+8y)= h)9y-(7y+x)+(6x-7y)= i)3y(9x-3)= j)5a+4(a-1)= k)6(a+2b)-3(2a-3b)= l)4a(b+3)-2(a-ab)= PILNE!! DAJE NAJ
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a) -2a + b - a - 2b + 3a = -b
b) -ab -b² + 3ab -2ab -3b² = -4b²
c) 2,1 a²b - 0,4a - 1,1 a²b + 0,4a² = 0,4 a² - 0,4 a + a²b
d) 5x + (2x -7) = 5x +2x -7 = 7x -7
e) -5x +(-2 +4x) = -5x -2 +4x = -x -2
f) -5x -(-2x -7) = -5x +2x + 7 = -3x + 7
g) -8y - (-7 +8y) = -8y + 7 -8y = -16y + 7
h) 9y -(7y +x) + (6x -7y) = 9y -7y -x +6x -7y = 5x -5y
i) 3y(9x -3) = 27xy - 9y
j) 5a + 4(a -1) = 5a +4a -4 = 9a -4
k) 6(a +2b) -3(2a -3b) = 6a +12b -6a +9b =21b
l) 4a(b +3) -2(a -ab) = 4ab + 12a -2a + 2ab = 10a + 6ab