Answer:
Step-by-step explanation:
hello :
5x²+8x-4 quadratic expression when : a = 5 and b=8 and c= -4
∆ = b²-4ac ∆ = 8²-4(5)(-4) = 64 +80 = 144 = 12²
X1 = ( -b -√∆)/2a X1 = (-8-12)/10 = -20/10= -2
X2 =(-b+√∆)/2a X2 = (-8+12)/10 = 4/10 = 2/5
us factorisation : a(X-X1)(X-X2)
5x²+8x-4= 5(x+2)(x-2/5) = (x+2)(5x-2)
you can verify ; (x+2)(5x-2) = 5x²-2x+10x-4 = 5x²+8x-4
Answer:
I believe the answer is D
Step-by-step explanation:
I'm not 100% sure though
Answer:
y+3x=5
Step-by-step explanation:
Step-by-step explanation:
AB and DC are parallel
AD and BC are parallel
It can't be a rectangle bcz sides AB and BC are not perpendicular to each other
You need a map or a picture of what you are talking about so i can help find you the answer so please take a picture and post it so i can see it.