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SVETLANKA909090 [29]
4 years ago
5

What is f(-3) for the function f(a)=-2a2-5a+4?

Mathematics
2 answers:
Oxana [17]4 years ago
6 0
Answer F(a)= -23 !!!!!!!!!
kvv77 [185]4 years ago
6 0
The answer is 31. You must plug -3 in for all A's in the function -2(-3)2-5(-3)+4=31
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What is the product?<br> 3 x [-4 5 -7]
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Step-by-step explanation: So the answers would be 78 as well

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3 years ago
Prove that for any value of x the value of the expression (x–3)(x+7)–(x+5)(x–1) is equal to –16.
Pachacha [2.7K]

For any value of x the value of the expression (x–3)(x+7)–(x+5)(x–1) is equal to –16.

Step-by-step explanation:

In order to prove the statement we can take any value of x and then solve the expression to see if it equal to -16 or not.

So,

Taking x = 2

=(x-3)(x+7)-(x+5)(x-1)\\=(2-3)(2+7)-(2+5)(2-1)\\=(-1)(9)-(7)(1)\\=-9-7=-16

Taking x = 5

=(x-3)(x+7)-(x+5)(x-1)\\=(5-3)(5+7)-(5+5)(5-1)\\=(2)(12)-(10)(4)\\=24-40\\=-16

Taking x= 10

=(x-3)(x+7)-(x+5)(x-1)\\=(10-3)(10+7)-(10+5)(10-1)\\=(7)(17)-(15)(9)\\=119-135=-16

Hence,

For any value of x the value of the expression (x–3)(x+7)–(x+5)(x–1) is equal to –16.

Keywords: Polynomials, expressions

Learn more about polynomials at:

  • brainly.com/question/10941043
  • brainly.com/question/10978510

#LearnwithBrainly

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harkovskaia [24]
<span>–4x + 3y = –12 –2x + 3y = –18, the answer would be x = 6</span>
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Step-by-step explanation:

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<em>Look Below</em>

Step-by-step explanation:

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