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Jawaban:

jika ada yg TDK paham mohon komentar

Jawab:

Penjelasan dengan langkah-langkah:

1.=5(x+10)

=5×x=5x

=5×10=50

=5x+50

2.=7x(-5x²+3x-10)

=7x×(-5x²)=-35x²

=7x×3x=21x

=7x×(-10)=-70x

=-35x²+21x-70x

=-35x²-69x

3.(x-2)(x+7)

=X×X=x²

=X×7=7x

=-2×x=-2x

=-2×7=-14

=X²+7x-2x-14

=X²+3x-14

4.(3x-2)(2x-4)

=3x×2x=6x

=3x×-4=-12x

=-2×2x=-4x

=-2×-4=8

=6x-12x-4x+8

=-6x-4x+8

=-2x+8

5.(2x-1)(1-x)

:2x×1:2x

:2x×-x:2

:-1×1=-1

:-1×-x:1x²

:2x+2-1+1x²