Question

Me ajudem! x³-2x²+3x, x= ½... . . . . . (a-b). (a+b), para a= 1 e b= ¾...................... (a+b+c).(a-b-c), para a=b=10 e c - 1

Answer 1

Olá,

x³-2x²+3x para x = 1/2

(1/2)³-2(1/2)²+3(1/2) =
1/8-2(1/4)+3/2 =
1/8-2/4+3/2 =
1/8-1/2+3/2 =
1/8+((-1+3)/2) =
1/8+(2/2) =
1/8+1 =
(1+8)/8 =
9/8

Resposta:

9/8

(a-b)(a+b) para a = 1 e b = 3/4

(1-3/4)(1+3/4) =
((4-3)/4)((4+3)/4) =
(1/4)(7/4) =
7/16

Resposta:

7/16

(a+b+c)(a-b-c) para a = 10, b = 10 e c = 1

(10+10+1)(10-10-1) =
(21)(-1) =
-21

Resposta:

-21