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velikii [3]
3 years ago
13

Solve for x by factorising.3x²+4x= 4​

Mathematics
1 answer:
Ivan3 years ago
3 0

Answer:

Step-by-step explanation:

3x^2+4x-4=0 (we move 4 to the other side to factor)

(3x-2)(x+2)

^think of 2 numbers that when you multiply it will be -4 and when you multiply one of it to 3x and add to the other it will be 4x.

Recheck:

-2(2)= -4 (correct)

-2x+6x=4x (correct)

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marin [14]

Answer:

n(A \cup B) = 6

Step-by-step explanation:

In Venn sets, we have that:

n(A \cup B) = n(A) + n(B) - n(A \cap B)

In which n is the number of elements that each set contains.

In this question:

n(A) = 8, n(B) = 9, n(A \cap B) = 6

So

n(A \cup B) = n(A) + n(B) - n(A \cap B) = 8 + 9 - 6 = 17 - 6 = 11

So

n(A \cup B) = 6

7 0
3 years ago
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4 years ago
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