Stosując wzór skróconego mnożenia , wykonaj potęgowanie
a) (x+5)²
b) (x+1)²
c) (2x+7)²
d) (9y+8z)²
e) (1/2 a+b)²
wzór skróconego mnozenia
(a + b)^2 = a^2 +2ab +b^2
a) (x +5)^2 =
x^2 +2 *x*5 +5^2
x^2 +10x +25
b) (x +1)^2 =
x^2 + 2 *x *1 +1^2
x^2 +2x +1
c) (2x +7)^2 =
(2x)^2 +2 *2x *7 +7^2
4x^2 +28x +49
d) (9y +8z)^2 =
(9y)^2 +2 *9y*8z +(8z)^2 =
81y^2 +144 yz + 64z^2
e) (1/2 a +b)^2 =
(1/2a)^2 + 2 *1/2a *b +b^2
1/4a^2 + 2/2ab + b^2
1/4a^2 + ab + b^2
a] [x+5]^=x^+10x+25b] [x+1]^=x^+2x+1c] [2x+7]^=4x^+28x+49d] [9y+8z]^=81y^+144yz+64z^e] [1/2a+b]^=1/4a^+ab+b^
^-to znak do potegi 2
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wzór skróconego mnozenia
(a + b)^2 = a^2 +2ab +b^2
a) (x +5)^2 =
x^2 +2 *x*5 +5^2
x^2 +10x +25
b) (x +1)^2 =
x^2 + 2 *x *1 +1^2
x^2 +2x +1
c) (2x +7)^2 =
(2x)^2 +2 *2x *7 +7^2
4x^2 +28x +49
d) (9y +8z)^2 =
(9y)^2 +2 *9y*8z +(8z)^2 =
81y^2 +144 yz + 64z^2
e) (1/2 a +b)^2 =
(1/2a)^2 + 2 *1/2a *b +b^2
1/4a^2 + 2/2ab + b^2
1/4a^2 + ab + b^2
a] [x+5]^=x^+10x+25
b] [x+1]^=x^+2x+1
c] [2x+7]^=4x^+28x+49
d] [9y+8z]^=81y^+144yz+64z^
e] [1/2a+b]^=1/4a^+ab+b^
^-to znak do potegi 2