Complete the following expressions below to make the statement true. 1. 81x² - 36 = (9x+36) (-)
2. x²- 9 = (2x+3)(2x-3)
3. x² + - 15 = (4x+3)(2x-5)
4. x²+6x+9= (+)

*please answer this correctly i really really need it ASAP please help me

answer: the first one

step-by-step explanation: use a calculator and divide the minutes by the dollars.

a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

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70 years.

step-by-step explanation:

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92