Me ajude a calcular essas coisas. Pra mim é tudo macumba.
a) (10+3)²
b) (2+)²
c) (x+11)²
d) (5a+b)²
e) (10-7)²
f) (9-x)²
g) (a-6b)²
h) (2a-b)²
i) (2+5b)·(2-5b)
j) (4+b)·(4-b)
a) (10+3)²
b) (2+)²
c) (x+11)²
d) (5a+b)²
e) (10-7)²
f) (9-x)²
g) (a-6b)²
h) (2a-b)²
i) (2+5b)·(2-5b)
j) (4+b)·(4-b)
More Questions From This User See All
Lista de comentários
b) 2² = 2 . 2 = 4
c) x² + 11² = x . x + 11 . 11 = x + 121 = 121x
d) 5a² + b² = 5a . 5a + b . b = 10a + b = 10ab
e) 3² = 3 . 3 = 9
f) ( 9 - x ) . ( 9 - x) = 81 - 9x - 9x + x²=
x² - 18x + 81 = 0
a= 1
b= -18
c= 81
x= - ( - 18) + - V -18² - 4 . 1 . 81 / 2 . 1
x= 18 + - V 324 - 324 / 2
x = 18 + - V 0 /2
x' e x" = 18 + 0 / 2 = 18/ 2 = 9
g) ( a - 6b) . ( a - 6b) = a² - 6ab - 6ab + 36b² = a² - 12ab + 36b²
h) ( 2a - b ) . ( 2a - b) = 4a² - 2ab - 2ab + b² = 4a² + b² - 4ab
i) 4 - 10b + 10b - 25b² = 4 - 25b²
j) 16 - 4b + 4b - b² = 16 - b²