2.2 Use the graph f(x) = -x² + 8x + 20 to determine the values of:
2.2.1
p for which – x² +8x + p = 0 will have equal roots.
2.2.2 b for which - x2 + 8x + 20 = b will have no real roots.​

answer: 75°

step-by-step explanation:

∠esk is the supplement of ∠edk, so is 100°. ∠esd = 1/2·arc ed, so is 25°.

since ∠esk = ∠esd + ∠dsk

you have 100° = 25° + ∠dsk . .

fill in known values 75° = ∠dsk . . . . .

subtract 25°

step-by-step explanation:

all of them are elements inside set of real numbers since none of them appears to have complex number form.

hope this .

r3t40