x2-4x+3
anyone??who knows answer
Answers
We are asked for factorise:
x
2
+
4
x
+
3
First notice that the function is a quadratic and so will have two factors. Since the coefficient of
x
2
is 1, the factors will be of the form:
(
x
+
a
)
(
x
+
b
)
We will assume that a and b are integers.
Hence, we need to find a and b such that the product of the factors is equal to the given quadratic function .
Now consder the absoute value of constant term, 3. Since 3 is prime its only factors are 3 and 1. Since the constant term is positive, a and b can only be 3 and 1 or -3 and -1.
Finally observe that the coefficient of
x
is positive 4 and that the sum of 3 and 1 is positive 4. Thus, a and b must be 3 and 1 (or the other way around, but this makes no difference to our factorisation)
Hence we see that:
x
2
+
4
x
+
3
=
(
x
+
3
)
(
x
+
1
)
Therefore the factors are
(
x
+
3
)
and
(
x
+
1
)
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Answer:
x^2-4x+3
x^2-3x-x+3
x(x-3)-1(x-3)
(x-1)(x-3)
Step-by-step explanation:
hope it helps you