Odpowiedź
Szczegółowe wyjaśnienie:
a) ( d+1)( d² +3d +5)= d³ +3d² +5d +d² +3d +5= d³ +4d² +8d +5
b) ( 8 -2y)( 3y³ +4y² - y)= 24y³ +32 y² -8y -6y⁴- 8y³ +2y² =
=-6y⁴ +16y³ +34y² -8y
c) (4a² - 4a +5)(2a² +7)= 8a⁴ +28a² -8a³ -28a +10a² +35=
=8a⁴ -8a³+38a² -28a +35
d) (x² +x² -1)(x² -y² +1)= (2x² -1)( x² - y² +1)= 2x⁴ -2x²y² +2x² -x² +y² -1=
2x⁴ -2x²y² +x² +y² -1
Odpowiedź:
a)
(d + 1)(d^2 + 3d + 5) = d³ + d² + d + d² + 3d + 5 = d³ + 2d² + 4d + 5
b)
(8 - 2y)(3y^3 + 4y^2 - y) = 24y³ + 32y² - 8y - 6y^4 - 8y³ + 2y² =
= -6y^4 - 16y³ + 34y² - 8y
c)
(4a^2 - 4a + 5)(2a^2 + 7) = 8a^4 + 28a² - 8a³ - 28a + 10a² + 35 =
= 8a^4 - 8a³ + 38a² - 28a + 35
d)
(x^2 + x^2 - 1)(x^2 - y^2 + 1) = (2x² - 1)(x² - y² + 1)= 2x^4 - 2x²y² + 2x² - x² + y² - 1
= 2x^4 - 2x³y² + x² + y² - 1
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Odpowiedź
Szczegółowe wyjaśnienie:
a) ( d+1)( d² +3d +5)= d³ +3d² +5d +d² +3d +5= d³ +4d² +8d +5
b) ( 8 -2y)( 3y³ +4y² - y)= 24y³ +32 y² -8y -6y⁴- 8y³ +2y² =
=-6y⁴ +16y³ +34y² -8y
c) (4a² - 4a +5)(2a² +7)= 8a⁴ +28a² -8a³ -28a +10a² +35=
=8a⁴ -8a³+38a² -28a +35
d) (x² +x² -1)(x² -y² +1)= (2x² -1)( x² - y² +1)= 2x⁴ -2x²y² +2x² -x² +y² -1=
2x⁴ -2x²y² +x² +y² -1
Odpowiedź:
a)
(d + 1)(d^2 + 3d + 5) = d³ + d² + d + d² + 3d + 5 = d³ + 2d² + 4d + 5
b)
(8 - 2y)(3y^3 + 4y^2 - y) = 24y³ + 32y² - 8y - 6y^4 - 8y³ + 2y² =
= -6y^4 - 16y³ + 34y² - 8y
c)
(4a^2 - 4a + 5)(2a^2 + 7) = 8a^4 + 28a² - 8a³ - 28a + 10a² + 35 =
= 8a^4 - 8a³ + 38a² - 28a + 35
d)
(x^2 + x^2 - 1)(x^2 - y^2 + 1) = (2x² - 1)(x² - y² + 1)= 2x^4 - 2x²y² + 2x² - x² + y² - 1
= 2x^4 - 2x³y² + x² + y² - 1
Szczegółowe wyjaśnienie: