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telo118 [61]
3 years ago
6

What is the discriminant of the polynomial below? 2x^2+3x-7

Mathematics
1 answer:
Katena32 [7]3 years ago
7 0

Answer:

Option C. 65

Step-by-step explanation:

we know that

The discriminant of a quadratic equation of the form ax^{2} +bx+c=0 is equal to

D=b^{2}-4ac

in this problem we have

2x^{2} +3x-7  

so

a=2\\b=3\\c=-7

substitute

D=3^{2}-4(2)*(-7)

D=9+56

D=65

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Show your work:
Flura [38]

The distributive property: a(b + c) = ab + ac

127 × 32 = 127 × (30 + 2) = 127 × 30 + 127 × 2 = (130 - 3)  × 30 + (130 - 3) × 2

=(130)(30) - (3)(30) + (130)(2) - (3)(2) = 3900 - 90 + 260 - 6

= 3810 + 254 = 4064


127 × 32 = (130 - 3) × 32 = 130 × 32 - 3 × 32 = 130 × (30 + 2) - 96

= (130)(30) + (130)(2) - 96 = 3900 + 260 - (100 - 4) = 4160 - 100 + 4

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3 years ago
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expeople1 [14]
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kozerog [31]

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Step-by-step explanation:

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How to get answer:

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