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Helga [31]
3 years ago
14

If x is a real number, find 49x^2+14x(19-7x)+(19-7x)^2.

Mathematics
1 answer:
SpyIntel [72]3 years ago
8 0
19^2 or 361 is the answer to the equation
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WILL GIVE BRAINLEST!!!<br>Find the length of the base.
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What is a reasonable estimate for the volume of a number cube:<br> 8 cm3, 27 in?, or 1 ft??
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3 0
2 years ago
Hello, could you please explain this to me?
Viefleur [7K]

Find the value of r(q(4)), so first you need to find the value of q(4).

q(4), this means that x = 4, so substitute/plug it into the equation to find the value of q(x) when x = 4:

q(x) = -2x - 1      Plug in 4 into "x" since x = 4

q(4) = -2(4) - 1

q(4) = -8 - 1

q(4) = -9        

Now that you know the value of q(4), you can find the value of r(x) when x = q(4)

r(x) = 2x² + 1

r(q(4)) = 2(q(4))² + 1      Plug in -9 into "q(4)" since q(4) = -9

r(q(4)) = 2(-9)² + 1

r(q(4)) = 2(81) + 1

r(q(4)) = 163           163 is the value of r(q(4))

5 0
3 years ago
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