What is the value of the polynomial #-6x^2-3y^2+6xy-5#, given #x = .9# and #y = -6.7#?

1 Answer
Jim G.
Feb 21, 2016

#-180.71 #

Explanation:

Substitute the given values of x and y into the expression

hence: #- 6(0.9)^2 - 3(-6.7 )^2 + 6(0.9xx-6.7 ) - 5#

and now evaluate each term.

#-6xx0.81 - 3 xx44.89 + 6 xx-6.03 - 5#

# = -4.86 - 134.67 - 36.18 - 5 = - 180.71#

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