
We can factorise this expression by grouping. First let us arrange it in this way

Let us bracket them like this:

In the first bracket portion, take x as common and in the second expression, take 2 as common.

<u>Answer</u><u>:</u>

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It’s D, y = 4.
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Answer:
x1 = t, x2 = -t and x3 = 0
Step-by-step explanation:
Given the system of equation
x1 + x2 + x3 = 0 .... 1
x1 + x2 + 9x3 = 0 .... 2
Subtract both equation
x3 - 9x3 = 0
-8x3 = 0
x3 = 0
Substitute x3 = 0 into equation 1
x1 + x2 + 0 = 0
x1+x2 = 0
x1 = -x2
Let t = x1
t = -x2
x2 = -t
Hence x1 = t, x2 = -t and x3 = 0
Answer:
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Step-by-step explanation: