Answer
$51x^2+31x-5$
Work Step by Step
Use the FOIL method on the second and third sets of parentheses. Then combine like terms.
$(2x^2+3x-9)+(7x+2)^2$
$=(2x^2+3x-9)+(7x+2)(7x+2)$
$=(2x^2+3x-9)+(49x^2+28x+4)$
$=51x^2+31x-5$
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