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Find t if the expansion of the product of x^3 - 4x^2 + 5x - 5 and x^2 + tx - 7 has no x^2 term.

 Jun 25, 2022
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Find t if the expansion of the product of x^3 - 4x^2 + 5x - 5 and x^2 + tx - 7 has no x^2 term.

 

what are the x^2 terms

-4x^2*( -7)    +    5x(tx)   +    -5(x^2)

 

so what is the coefficient of x^2 in terms of t  ?

 Jun 26, 2022
edited by Melody  Jun 26, 2022

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