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Minchanka [31]
3 years ago
7

Given that a = 2,5= 2 and C = -1 work out 2b – 3ac

Mathematics
1 answer:
poizon [28]3 years ago
6 0

Step-by-step explanation:

2b-3ac

=2×2-3×2×(-1)

= 4+6

=10

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3 years ago
What are the solutions of the system?
siniylev [52]
y=x^2-3x+2 \\y=4x-4

A. (1, 0) and (–6, –28) 

B. (1, 20) and (6, 0) 

C. (1, 0) and (6, 20) 

D. no solution


Correct answer is C.


y=x^2-3x+2 \\y=4x-4\\ \\4x-4=x^2-3x+2 \\x^2-7x+6=0 \\x^2-6x-x+6=0 \\x(x-6)-(x-6)=0 \\(x-6)(x-1)=0 \\x=6\,\text{ or }x=1 \\y=4\times 6-4=20 \,\text{ or }y=4\times 1-4=0 \\ \\(6,20)\,\text{ and }(1,0)

8 0
3 years ago
Read 2 more answers
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