Who wanna be my freand

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Which expression is the factorization of x^2+10+21

Write the equation of the circle centered at (10,-2) with radius 2.