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Rom4ik [11]
3 years ago
7

Expand and simplify 2(x+7)+3(x+1)

Mathematics
1 answer:
kirza4 [7]3 years ago
6 0
2(x+7)+3(x+1)
= 2x+14+3x+3
= 5x+17
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5 0
3 years ago
3(2x squared - x) - x squared <br><br> SIMPLIFY!!!
romanna [79]
3(x^2 -x) -x
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3 0
3 years ago
Please help
JulsSmile [24]

Answer:

correct

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Root99 + root44<br> can someone help?
iogann1982 [59]

Answer:

here I worked it out on my calculator so it should be right

5 root 11

6 0
2 years ago
F(x) = 4x^2 - 3x + 2kx + 1 
dybincka [34]
f(x)=4x^2-3x+2kx+1=4x^2+(2k-3)x+1\\\\a=4;\ b=2k-3;\ c=1\\\\function\ has\ two\ zeros\ when\ \Delta=b^2-4ac > 0\\\\\Delta=(2k-3)^2-4\cdot4\cdot1=4k^2-12k+9-16=4k^2-12k-7 > 0\\\\a_k=4;\ b_k=-12;\ c_k=-7\\\\\Delta_k=(-12)^2-4\cdot4\cdot(-7)=144+112=256\\\\k_1=\frac{-b_k-\sqrt{\Delta_k}}{2a_k};\ k_2=\frac{-b_k+\sqrt{\Delta_k}}{2a_k}

\sqrt{\Delta_k}=\sqrt{256}=16\\\\k_1=\frac{12-16}{2\cdot4}=\frac{-4}{8}=-\frac{1}{2};\ k_2=\frac{12+16}{2\cdot4}=\frac{28}{8}=\frac{7}{2}\\\\a_k=4 > 0\ (up\ parabola\ arms-see\ the\ picture)\\\\Answer:k\in(-\infty;-\frac{1}{2})\ \cup\ (\frac{7}{2};\ \infty)

6 0
3 years ago
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