Answer:
1 - 2√7
Step-by-step explanation:
( 4 + √7)(2 - √7)
Open the brackets with
( 4+ √7)
= 4( 2 - √7) + √7(2 - √7)
= 8 - 4√7 + 2√7 - √49
= 8 ( -4 + 2)√7 - √49
= 8 - 2√7 - 7
= 8 - 7 - 2√7
= 1 - 2√7
Answer:
x=-15 (the * is the multiplication)
Step-by-step explanation:
-4/5x+1=13
-4/5x+1−1=13−1
-4/5x=12
(5/-4) * (-4/5x)= (5/-4)* (12)
x=-15
Answer:
<h2>The answer is - 2</h2>
Step-by-step explanation:
Equation of a line is y = mx + c
where
m is the slope
c is the y intercept
To find the slope we must first write the equation in the general equation above
That's
6x + 3y = 15
<u>Make y the subject</u>
Send 6x to the other side of the equation
3y = - 6x + 15
<u>Divide both sides by 3</u>
We have
y = - 2x + 5
Comparing with the general equation above
Slope / m = - 2
Hope this helps you
To multiply complex numbers in polar form: multiply the r parts and add the angle parts. Or
<span><span>r1</span><span>(cos <span>θ1 </span>+ i sin <span>θ1</span>)</span></span> <span>× <span>r2</span><span>(cos <span>θ2 </span>+ i sin <span>θ2</span>)</span></span>
= r1r2(cos(θ1+θ2) + i sin(θ1+θ2))
so zw
=3*8(cos(π/9+π/12) + i sin(π/9+π/12))
=24(cos(7/36)π + i sin(7/35)π)
