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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