Which expression is the factored form of −4.5n+3−4.5n+3 ?
−3(1.5n−1)−3(1.5n−1)
−1.5(−3n+2)−1.5(−3n+2)
−1.5(3n+2)−1.5(3n+2)
−3(1.5n+1)

−3(1.5n−1)−3(1.5n−1)

Step-by-step explanation:

To factor the expression −4.5n+3−4.5n+3, find the GCF between each term.  Using the GCF 3, divide each term by 3 and rewrite it as −3(1.5n−1)−3(1.5n−1).

The other options are not the factors because they give the wrong signs of at least one term in the expression.

−1.5(−3n+2)−1.5(−3n+2)  = 4.5n -3 + 4.5n - 3

−1.5(3n+2)−1.5(3n+2)  = -4.5n - 3 - 4.5n - 3

−3(1.5n+1) = -4.5n - 3

step-by-step explanation:

the answer is 128

m∠a is 90°

m∠b is 40°