Question

(x+4)(x+5) productos notables

Answer 1

(x+4)(x+5)

x² + 5x + 4x + 20

x² + 9x + 20

 Eternamente

☆༒ axllxa  ༒☆

Answer 2

$(x + 4)(x + 5) \\ x \times x + 5x + 4x + 4 \times 5 \\ {x}^{2} + 5x + 4x + 20 \\ \bf {x}^{2} + 9x + 20$