Give the values a, b, and c needed to write the equations standard form. 2/3(x-4)(x+5)=1

The standard form of the quadratic equation is given by:
 ax ^ 2 + bx + c
 What we must do in this case is to rewrite the given equation.
 We have then:
 2/3 (x-4) (x + 5) = 1
 (x-4) (x + 5) = 3/2
 (x ^ 2 + 5x-4x-20) = 3/2
 2x ^ 2 + 2x-40 = 3
 2x ^ 2 + 2x-43 = 0
 Thus, the values of a, b and c are:
 a = 2
 b = 2
 c = -43
  
 a = 2
 b = 2
 c = -43

-7,14,-28,56,-112

an = a1(r)^n-1

a4 = -7(-2)^4-1

a4 = -7(-2)³

a4 = -7(-8)

a4 = 56

an = a1(r)^n-1

a5 = -7(-2)^5-1

a5 = -7(-2)⁴

a5 = -7(16)

a5 = -112

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