Wykonaj mnożenie:
3.35
3.36 a,b
Wykonaj działania:
3,37
3.35.
a) (x + 1)(y - 3) =
xy - 3x + y - 3
b) (3x - 5y)(7y + 2x) =
21xy + 6x^2 - 35y^2 - 10xy =
11xy + 6x^2 - 35y^2
e) (a - 3)(2a - 7) =
2a^2 - 7a - 6a + 21 =
2a^2 - 13a +21
g) (-y^2 - 1)(9 - 4y^2) =
-9y^2 + 4y^4 - 9 + 4y^2 =
-5y^2 + 4y^4 -9
3.36
a) 5(x - 4)(2x +3) =
5(2x^2 + 3x - 8x - 12) =
5(2x^2 - 5x - 12) =
10x^2 - 25x - 60
b) -2(2a + 1)(4 - 3a) =
-2(8a - 6a^2 + 4 - 3a) =
-2(5a - 6a^2 + 4)
-10a + 12a^2 -8
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
3.35.
a) (x + 1)(y - 3) =
xy - 3x + y - 3
b) (3x - 5y)(7y + 2x) =
21xy + 6x^2 - 35y^2 - 10xy =
11xy + 6x^2 - 35y^2
e) (a - 3)(2a - 7) =
2a^2 - 7a - 6a + 21 =
2a^2 - 13a +21
g) (-y^2 - 1)(9 - 4y^2) =
-9y^2 + 4y^4 - 9 + 4y^2 =
-5y^2 + 4y^4 -9
3.36
a) 5(x - 4)(2x +3) =
5(2x^2 + 3x - 8x - 12) =
5(2x^2 - 5x - 12) =
10x^2 - 25x - 60
b) -2(2a + 1)(4 - 3a) =
-2(8a - 6a^2 + 4 - 3a) =
-2(5a - 6a^2 + 4)
-10a + 12a^2 -8