Hai, pls help me! *For 15 points!

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Multiply: (x – 4)(x + 5)…
(I literally don't know the answer!)

Hai, pls help me! *For 15 points!

Jawaban:

{x}^{2} + x - 20

Penjelasan dengan langkah-langkah:

(x - 4)(x + 5) = {x}^{2} - 4x + 5x - 20 \ = {x}^{2} + x - 20

Jawaban:

x² + x – 20

Penjelasan dengan langkah-langkah:

( x – 4 ) ( x + 5 )

= ( x . x ) + ( x . 5 ) + ( -4 . x ) + ( -4 . 5 )

= x² + 5x – 4x – 20

= x² + x – 20