3 years ago

Evaluate [6+3(-2)]-6

Mathematics

1 answer:

bagirrra123 [75]3 years ago

8 0

Answer: -6

Multiply 3 by -2 first =-6 inside brackets

Original 6 inside brackets plus -6 from performing multiplication problem inside the brackets equals 0, so you now have 0 minus the original -6 which equals -6 overall

Step-by-step explanation:

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Question 1 What is the solution of n² - 49 = 0? 0 +7 07 -7 O no solution

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Hey there!

This can be written as $n^{2}-(7)^{2}$

This is in form of $\fbox{a^{2}-b^{2}}$ , it can be expanded as $\fbox{(a-b)(a+b)}$

=> (n-7)(n+7)=0
=> n -7 = 0 or n + 7 = 0
=> n = 7 or n = -7

So option 7 , -7 are correct.

Hope this is clear :)
Have a good day:)

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