Urgente!!!!!!!!!!!!!!!!!!!!!!!!!
como fatorar : (a+1)² + 2 ( a+1) +1 =
e tambem x²-4x+4 + 3 ( x-2) (x+1)
Soluções para a tarefa
Respondido por
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(a+1)² + 2 ( a+1) +1 =
(a+1)(a+1)+2(a+1)+1=0
a²+a+a+1+2a+2+1=0
a²+4a+2=0 a=1 b=4 c=2
Δ=b²-4ac
Δ=(4)²-4(1)(2)
Δ=16-12
Δ=4
-b+-√Δ -(4)+-√4 -4+-2
x=--------------x=-------------x=-----------------
2a 2.1 2
-4+2 -2
x'=-------------x=--------x'=-1
2 2
-4-2 -6
x"=--------x=---------x"=-3
2 2
x²-4x+4 + 3 ( x-2) (x+1)
x²-4x+4+3x-6+3x+3=0
x²+2x+1=0 a=1 b=2 c=1
Δ=b²-4ac
Δ=(2)²-4(1)(1)
Δ=4-4
Δ=0
-b+-√Δ -(2)+-√0 -2+-0
x=-------------------x=----------------x=------------------
2.a 2.1 2
-2+0 -2
x'=------------x'=-----------x'= -1
2 2
-2-0 -2
x'=-----------x"=---------x"= -1
2 2
(a+1)(a+1)+2(a+1)+1=0
a²+a+a+1+2a+2+1=0
a²+4a+2=0 a=1 b=4 c=2
Δ=b²-4ac
Δ=(4)²-4(1)(2)
Δ=16-12
Δ=4
-b+-√Δ -(4)+-√4 -4+-2
x=--------------x=-------------x=-----------------
2a 2.1 2
-4+2 -2
x'=-------------x=--------x'=-1
2 2
-4-2 -6
x"=--------x=---------x"=-3
2 2
x²-4x+4 + 3 ( x-2) (x+1)
x²-4x+4+3x-6+3x+3=0
x²+2x+1=0 a=1 b=2 c=1
Δ=b²-4ac
Δ=(2)²-4(1)(1)
Δ=4-4
Δ=0
-b+-√Δ -(2)+-√0 -2+-0
x=-------------------x=----------------x=------------------
2.a 2.1 2
-2+0 -2
x'=------------x'=-----------x'= -1
2 2
-2-0 -2
x'=-----------x"=---------x"= -1
2 2
Respondido por
0
a)
(a+1)² + 2 ( a+1) +1 = [(a+1) + 1][(a+1) + 1] = (a + 2)(a + 2) = (a + 2)²
............
b)
x²-4x+4 + 3 (x-2) (x+1) = (x+2)(x-2) + 3(x-2)(x+1) = (x-2)[(x+2) + 3(x+1)] =
= (x-2)[x + 2 + 3x + 3] = (x-2)(4x+5)
(a+1)² + 2 ( a+1) +1 = [(a+1) + 1][(a+1) + 1] = (a + 2)(a + 2) = (a + 2)²
............
b)
x²-4x+4 + 3 (x-2) (x+1) = (x+2)(x-2) + 3(x-2)(x+1) = (x-2)[(x+2) + 3(x+1)] =
= (x-2)[x + 2 + 3x + 3] = (x-2)(4x+5)
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