Answer:
X²+16x-63
Step-by-step explanation:
expand out the brackets to get:
X²+9x+7x-63
simplify:
X²+16x-63
<span>They are finite sums of expressions of the form where a is a constant, x is the variable and k is a non-negative integer</span>
Ommon multiples of 4<span> & </span>7<span> I wonder what are the numbers that are </span>common multiples of 4 and 7<span>. I used the </span>4<span>first - </span>4<span>,8,12,16, etc. - and the </span>7<span> is </span>7<span>,21,28, etc hope this is what you need .
.</span>
Answer:
Step-by-step explanation:
You can start by recognizing 19/12π = π +7/12π, so the desired sine is ...
sin(19/12π) = -sin(7/12π) = -(sin(3/12π +4/12π)) = -sin(π/4 +π/3)
-sin(π/4 +π/3) = -sin(π/4)cos(π/3) -cos(π/4)sin(π/3)
Of course, you know that ...
sin(π/4) = cos(π/4) = (√2)/2
cos(π/3) = 1/2
sin(π/3) = (√3)/2
So, the desired value is ...
sin(19π/12) = -(√2)/2×1/2 -(√2)/2×(√3/2) = -(√2)/4×(1 +√3)
Comparing this form to the desired answer form, we see ...
A = 2
B = 3
