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Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n