If f (x+5) = x^2+kx+30 what is K equalled to?

Question

Mathematics

Verena

2 September, 18:37

If f (x+5) = x^2+kx+30 what is K equalled to?

+2

Answers (2)

Know the Answer?

Dex · Answer 1

F (x+5) means for every x, it is x+5

ok so since it is 2nd degree, we do exponent

f (x) = x^2

f (x+5) = (x+5) ^2=x^2+10x+25

we need 5 more

f (x) = x^2+5

f (x+5) = x^2+10x+25+5=x^2+10x+30

k=10

Thomas Castaneda · Answer 2

9 = 2^2 - 2k - 3 9 = - 2k + 4 - 3 9 - 4 + 3 = - 2k 8 = - 2k Divide by - 2 k = - 4