Question

(4x+5) (4x-5);(y-5)(y+5);(x-3y)(x+3y)

Answer 1

Sper ca te-am ajutat

Mult succes

Answer 2

Răspuns: Ai mai jos rezolvarea

Explicație pas cu pas:

Buna!

Aplicam formule de calcul prescurtat

$\color {cc0000}\Large \boxed{ \bf (a + b) \cdot(a - b) = {a}^{2} - {b}^{2} }$

$\it~~$

$\large \bf (4x + 5) \cdot(4x -5) = (4x)^{2} - {5}^{2} = \boxed{\bf 16x^{2} - 25 }$

$\it~~~$

$\large \bf (y - 5) \cdot(y +5) = y^{2} - {5}^{2} = \boxed{\bf y^{2} - 25 }$

$\it~~~$

$\large \bf (x -3y) \cdot(x +3y) = x^{2} - (3y)^{2} = \boxed{\bf x^{2} - 9y^{2} }$

==pav38==