tentukan hasil perkalian suku dua berikut A. (2x + 3)(5 +x) B.(8x - 10)(10x - 8) C.(10x - 3)(2x - 1) D.(2p + 5)(2p - 5)
Matematika
Risqita150205
Pertanyaan
tentukan hasil perkalian suku dua berikut A. (2x + 3)(5 +x) B.(8x - 10)(10x - 8) C.(10x - 3)(2x - 1) D.(2p + 5)(2p - 5)
1 Jawaban
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1. Jawaban aliahmuk
A. (2x+3)(5+x) = 10x +2x^2 +15 + 3x
= 2x^2 + 13x +15
B. (8x-10)(10x-8) = 80x^2 -64x - 100x +80
= 80x^2 -164x +80
C. (10x-3)(2x-1) = 20x^2-10x-6x+3
= 20x^2 - 16x +3
D. (2p+5)(2p-5) = 4p^2 -10p+10p-25
= 4p^2-25