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enyata [817]
3 years ago
8

3x2 + 5x - 7(x2 + 4)

Mathematics
2 answers:
goldenfox [79]3 years ago
5 0

Answer:

-4x^2+5x-28

Step-by-step explanation:

Expand -7(x^2 +4) = 3x^2+5x-7x^2-28

Simplify 3x^2+5x-7x^2-28 = -4x^2+5x-28

Lelechka [254]3 years ago
3 0

Answer: -4x² + 5x - 28

Step-by-step explanation:

<u>Given expression</u>

3x² + 5x - 7 (x² + 4)

<u>Expand parentheses and apply the distributive property</u>

=3x² + 5x - 7x² - 28

<u>Combine like terms</u>

=(3x² - 7x²) + 5x - 28

=\boxed{-4x^2+5x-28}

Hope this helps!! :)

Please let me know if you have any questions

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What is the lowest whole number for hypotenuse c when using the formula <img src="https://tex.z-dn.net/?f=%5Csqrt%7Ba%5E2%2Bb%5E
nata0808 [166]

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Answer:

  0

Step-by-step explanation:

If a=b, you are asking for a whole number c such that ...

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If 'a' is a whole number, the only whole numbers that satisfy this equation are ...

  c = 0 and a = 0.

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The lowest whole number c such that c = √(a²+b²) and a=b=whole number is zero.

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√2 is irrational, so there cannot be two non-zero whole numbers such that c/a=√2.

_____

<em>Additional comment</em>

If you allow 'a' to be irrational, then you can choose any value of 'c' that you like. Whole numbers begin at 0, so 0 is the lowest possible value of 'c'. If you don't like that one, you can choose c=1, which makes a=(√2)/2 ≈ 0.707, an irrational number. The problem statement here puts no restrictions on the values of 'a' and 'b'.

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7 0
4 years ago
Read 2 more answers
Use the distributive property to find the equivalent expression.<br><br> 6(2 + 5t) = ?+?t
IgorLugansk [536]

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