Question

1. -5(2a-3b) = -5(__) - (-5)(__)
= ____ + ____
2.-2b(a-c)= -2b(__) -(-2b)(__)
=_____+____
3.(x-2)(x+4) = x(x+4) - 2(x+_)
= x^2 + ___ -2x-___= __+__-___
4.(x+y)2=(x+y)(x+__)
=x(x+__) +y(x+___)
=x^2 + ___ +yx +__
= ___+___+___ (xy=yx)
5. (x-y)^2= (x-y)(__-__)
=x(___=___) -y(___-___)
=x^2 -___-yx+___=___-___+___
TOlong dong Isiin juga :( Jangan sekedar jawabnya ) ksih penjelasan biar q bisa :D

Answer 1

Itu pake sifat distributif

1. -5(2a-3b) = -5(2a) - (-5)(3b) = -10a + 15b
2. -2b(a-c) = -2b(a) - (-2b)(c) = -2ab + 2bc
3. (x-2)(x+4) = x(x+4) - 2(x+4) = + 4x - 2x - 8 = + 2x - 8
4. = (x+y)(x+y) = x(x+y) + y(x+y) = =
5. = (x-y)(x-y) = x(x-y) - y(x-y) ==