Answer:
Step-by-step explanation:
First method: for (x+3)^2 if you multiply (x+3)(x+3) you get x^2+6x+9 which doesn't equal x^2+9
Second way: plug in a variable for example (2+3)^2= 25 and 2^2+9=13 so 13 doesn't equal 25
Answer:
4.33
Step-by-step explanation:
1. Pythagoras Theorem

2. Find b

=
=
= -4
but sqrt(-4) is not possible
b ≅ 4
OR (Require trig knowledge)
1. Sine Rule

2. Plug in numbers

b ≅ 4.33
Answer:
um, your showing us an answer
Step-by-step explanation:
basically, they're saying that
w = 9. So 9-9=0
Answer:
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Step-by-step explanation:
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Answer:
2nd: 2
4th: -4
11th: -25
Step-by-step explanation:
When you substitute a number into the equation you get that number term. So, if you substituted in 1, you get the first term. To find the second term, you substitute in 2:
A(2) = 5 + (2 - 1)(-3)
A(2) = 5 + (1)(-3)
A(2) = 5 - 3
A(2) = 2
To get the 4th term you substitute in 4:
A(4) = 5 + (4 - 1)(-3)
A(4) = 5 + (3)(-3)
A(4) = 5 - 9
A(4) = -4
And we do the same for the 11th term:
A(11) = 5 + (11 - 1)(-3)
A(11) = 5 + (10)(-3)
A(11) = 5 - 30
A(11) = -25