Question

Oblicz wartość wyrażenia .
a)2x+5 dla x=2
b)2a²-3 dla x=(-1)
c)2x(x-1)+2 dla x=3
2.Zredukuj wyrazy podobne.
a)a+2b+3c-4c-5b-6a=
b)13x+7y-10x-4y+5y=
c)7xy-10xy+3x²y-7x²y+4xy=
d)12ax-x+a-10ax=
e)a³+2a-a²+3a²-10a+5=
f)12x-3y+2y-5x-6y=
3.Wykonaj mnożenie :
2(a+b)=
2b(a-3)=
x(2y-5)=
3(x+2y-6)=
-2(x+4-y)=
5a(a-2)=
-2(a-2c)=
8x(x+y)=
a(b+a-ab)=
4(x-3)=

Answer 1

1)
a) (2*2) + 5 = 9
b) 2*(-1)² - 3 = 2*1 - 3 = -1
c) 2*3(3-1)+2 = 12+2 = 14

2)
a) -5a - 3b -c
b) 3x + 8y
c) xy - 4x²y

3)
a) 2a + 2b
b) 2ab - 6b
c) 2xy -5x
d) 3x + 6y - 18
e) -2x -8 + 2y
f) 5a²- 10a
g) -2a + 4c
h) 8x² +8y
i) ab + a² -a²b
j) 4x-12


:)

Answer 2

Oblicz wartość wyrażenia .
a)2x+5 dla x=2
2×2+5=4+5=9
b)2a²-3 dla x=(-1)
2(-1)²-3=2×1-3=2-3=-1
c)2x(x-1)+2 dla x=3
2×3(3-1)+2=6×2+2=12+2=14
2.Zredukuj wyrazy podobne.
a)a+2b+3c-4c-5b-6a=a-6a+2b-5b+3c-4c=-5a-3b-c
b)13x+7y-10x-4y+5y=13x-10x+7y-4y+5y=3x+8y
c)7xy-10xy+3x²y-7x²y+4xy=3x²y-7x²y+7xy-10xy+4xy=-4x²y+xy
d)12ax-x+a-10ax=12ax-10ax+a-x=2ax+a+x
e)a³+2a-a²+3a²-10a+5=a³-a²+3a²+2a-10a+5=a³+2a²-8a+5
f)12x-3y+2y-5x-6y=12x-5x-3y+2y-6y=7x-7y
3.Wykonaj mnożenie :
2(a+b)=2a+2b
2b(a-3)=2ab-6b
x(2y-5)=2xy-5x
3(x+2y-6)=3x+6y-18
-2(x+4-y)=-2x-8+2y
5a(a-2)=5a²-10a
-2(a-2c)=-2a+4c
8x(x+y)=8x²+8xy
a(b+a-ab)=ab+a²-a²b
4(x-3)= 4x-12

Answer 3

1.
a) 2*2+5=9
b)2*(-1)²-3=2*1-3=(-1)
c)2*3*(3-1)+2=14
2.
a)a+2b+3c-4c-5b-6a= -5a-3b-c
b)13x+7y-10x-4y+5y= 3x+8y
c)7xy-10xy+3x²y-7x²y+4xy= xy-4x²y
d)12ax-x+a-10ax= 2ax-x+a
e)a³+2a-a²+3a²-10a+5= a³+12a+2a²+5
f)12x-3y+2y-5x-6y= 7x-7y
3.
2(a+b)=2a+2b
2b(a-3)=2ba-6
x(2y-5)=2yx-5x
3(x+2y-6)=3x+6y-18
-2(x+4-y)= -2x-8+2y
5a(a-2)= 5a²-10
-2(a-2c)= -2a+4c
8x(x+y)= 8x²+8y
a(b+a-ab)= ab+a²-a²b
4(x-3)=4x-12