Use FOIL and simply, First times First, Outside times Outside, Inside times Inside, Last times Last.
(3x+5)(4x-1)
3x * 4x = 12x²
3x * -1 = -3x
5 * 4x = 20x
5 * -1 = -5
12x² - 3x + 20x - 5
Now simplify by adding -3x to 20x and get:
12x² + 17x - 5
The picture is blank so can’t help sorry
LCD is 12.
12 goes into 12 once. 12x1=12
12 goes into 60 five times. 12x5=60
Wouldn't it be -1 (minus one)? 12 - 1 = 11 and 9 - 1 = 8.
(-1) to the power of an even number is +1.
(-1) to the power of an odd number is -1.
Since 50 is an even number, (-1)⁵⁰ = 1.
