Sal finds the values of coefficients a and b that make (2x+4)(5x-9)=ax^2+bx-46 true for all x-values.
Multiply binomials by polynomials is a free educational video by Khan Academy.It helps students in grades 0 practice the following standards HSA.SSE.B.3.
1. HSA.SSE.B.3 : Choose and produce an equivalent form of an expression to reveal and explain properties of the quantity represented by the expression.
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