Write the coefficient of x2 in the following a) 2 + x2 + x b) 2 – 4x2 + x solution pls I will mark as brainliest

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Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

What is the solution set of the quadratic inequality x^2-5< or equal to 0