A-4: Algebraic Expressions and Operations
Obtain the sum of the coefficients of x3 and x4 in the sum of 2 x−a4 x+a2 and 3 x−15.
Enter the sum (ensuring a space between the factors) and press the Enter key.
Context Panel: Expand
Context Panel: Collect≻x
2 x−a4 x+a2+3 x−15
= collect w.r.t. x
Sum of the coefficients of x3 and x4 by control-drag (or copy/paste). Press the Enter key.
Assign the sum to q1.
q1≔2 x−a4⋅x+a2+3 x−15
Apply the expand command.
Apply the collect command.
Use the coeff command.
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