-83 + 24 + -19 would equal <span>-78. :)</span>
Answer: It's incorrect because 342 ÷ 6 = 57
Let's solve your problem step by step:
When you start dividing you notice that 6 goes into 3 zero times.
So then you see how many times 6 goes into 34. 6 goes into 34 exactly 5 times and you have a remainder of 4.
After that you bring down the 2 and you look at how many times 6 goes into 42. 6 goes into 42 exactly 7 times.
There is nothing left so you are left with the answer 57 which is your final answer.
49x^2 - 9 = 0
As there is no x term, we can pretty much guess we have a situation where we factlrise by something known aa difference of two squares, so to factorise it:
49 = 7^2
9 = 3^2
x^2 = (x)^2
so...
(7x - 3)(7x + 3) = 0
7x - 3 = 0 7x + 3 = 0
x = 3/7 x = -3/7