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
Answer:
–7x + 20
Step-by-step explanation:
(2x2 – 3x)(3x2 + 2x – 1)
(4 – 3x)(2x + 5)
(4*2x) + (4*5) + (–3x*2x) + (–3x*5)
8x + 20 –15x
–7x + 20
Answer:
The mad for this graph is 23 hope it helped!
Step-by-step explanation:
<em>If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).</em>
<em>If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down (no change).</em>
81.1<u>3</u>9 ≈ <u>81.1</u>
