Question

calcule 
(5x-1).(5x+1)= 
(a+b).(a+b)= 
(2x²-3x-6).(5x-2)=
(2a+3/5b).(a-1/2b)=

Answer 1

(5x - 1).(5x + 1)
25x² + 5x - 5x - 1
25x² - 1

(a + b).(a + b)
a² + ab + ab + b²
a² + 2ab+ b²

(2x² - 3x - 6).(5x - 2)
10x³ - 6x² - 15x² + 6x - 30x + 12
10x³ - 21x² - 24x + 12

(2a + 3/5b).(a - 1/2b)
2a² - 2a/2b + 3a/5b - 3/10b²
2a² + a/b - 3/10b²

Answer 2

Resposta:

a)(5x - 1).(5x + 1)

25x² + 5x - 5x - 1

25x² - 1

b)(a + b).(a + b)

a² + ab + ab + b²

a² + 2ab+ b²

c)(2x² - 3x - 6).(5x - 2)

10x³ - 6x² - 15x² + 6x - 30x + 12

10x³ - 21x² - 24x + 12

d)(2a + 3/5b).(a - 1/2b)

2a² - 2a/2b + 3a/5b - 3/10b²

2a² + a/b - 3/10b²

Explicação passo a passo:

Espero ter ajudado