Proof:-
In ∆XYZ and ∆VWZ
Hence
∆XYZ
∆VWZ(Side-Angle-Side)
2 + 5 + 8 + ... + 41 = 301
Answer:
301
D. negative 67 because laplace’s expansion
We can solve this problem using discriminant.
x^2-4x-12's discriminant is
(-4)^2-4*-12=16+48 which is clearly larger than 0
This means that it crosses over the axes 2 times.
In case you don't know what discriminant is, its in equation ax^2+bx+c
the discriminant is b^2-4ac.
If its positive it has 2 crosses with x axis, if negative then 0 crosses, if 0 then 1 cross.
Hope this helped at least a little bit :D
