Best to factor 5 out of the first 2 terms:
5x^2-7x+2=0 => <span>5(x^2 - [7/5]x) +2=0
Take half of [-7/5]: That'd be -7/10.
Square 7/10, add it to </span>5(x^2 - [7/5]x) +2=0 and then subtract it:
5(x^2 - [7/5]x)+ 49/100 - 49/100 ) +2=0
Then we have 5(x- [7/10] )^2 - 49/100 ) + 200/100 = 0
5(x-7/5)^2 - 245/100 + 200/100 = 0
5(x-7/5)^2 - 45/100 = 0
Dividing all terms by 5, x-7/5 = plus or minus sqrt( 9/100 )
x-7/5 = plus or minus 3/10
Then one root is x = 7/5 + 3/10, or x= 17/10 (answer #1)
The other is x = 7/5 - 3/10, or x = 14/10 - 3/10, or x = 7/10 (answer #2)
Answer:
b. 9 cm
Step-by-step explanation:
this is because to find the area of a parallelogram you have to multiply the height with the base therefore...
63/7 = 9
Answer:
Step-by-step explanation:
Let the remainder of the diameter is x.
<u>Use the intersecting chords theorem:</u>
- 6*x = (72/2)*(72/2)
- 6x = 1296
- x = 216
<u>The diameter:</u>
- d = 6 + x = 6 + 216 = 222 in
<u>The radius:</u>
