Cho hàm số 2x2 -4x-1 có đồ thị ( P ) a, khảo sát và vẽ ( p )
b, tìm tọa độ giao điểm của ( p) với d:y=x-1
c, dựa vào đồ thị , tìm các giá trị tham số m để phương trình : 2x2 -5x-1+6m=0 có 1 nghiệm dương và 1 nghiệm hông dương

y=mx+

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

include a picture of the drawing in order for me to

step-by-step explanation: