Answer:
If D< 0, the roots of the quadratic equation will b complex.
Step-by-step explanation:
Let 
is the given quadratic equation.
So, if the Discriminant (D) = 
, the the equation will have only complex solutions.
Complex roots are represented in the form of 
1. <u> x represents the X axis (real) co ordinate,</u>
<u>y represents the Y axis (imaginary) coordinate</u>
<u />
<u />
2. Also, the graph of the with equation D < 0 NEVER CROSSES the X - axis, as there are no real roots of the equation, only complex roots.
3. Here. roots are always identical but are opposite in signs. Such pair or roots with opposite sign are called CONJUGATE PAIRS.
Answer:
a) 4
b) 12
Step-by-step explanation:
Since, when an orange ball is drawn, three coins are tossed. So, sample points are
OHHH, OHHT, OHTH, OHTT. OTHH, 0THT, OTTH, OTTT
So, clearly, 8 sample points will have an orange ball.
When a blue ball is drawn, two coins are tossed. So, sample points are BHH,BHT,BTH,BTT.
So, clearly, 4 samples points will when a blue ball is drawn.
Total samples points=4+8=12
Answer:
Step-by-step explanation:
Arithmetic sequence
Tn = a+(n-1)d
= -85 +(601-1) 1/6
= -85 + 600/6
= -85 + 100
= 15
601th term is 15
Let her sisters age be x.
=>sister .....x
Sarah.
twice x=2x. then less than 5
=> (2x-5 )
if Sarah = 15 years
by substation, 2x-5=15
