Question

ayudenme si no saben no contesten (15+2x)(9+2x)-(15(9))=81

Answer 1

Explicación paso a paso:

(15 + 2X)(9+2X) – (15(9))=81

135 + 24X + 4X² – 135 = 81

4X² + 24X – 81 = 0

usamos formula cuadratica.

a= 4 ; b= 24 ; c= –81

soluciones finales son;

X1=

3 ( ✔13 – 2 )

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2

X2 =

3 ( ✔13 + 2 )

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2