write the expression 5x square - 4 - 3x square+ 6x + 8 + 5x - 13 in its simplified form.find it's value when x=-2
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25x^2 -4 -9 x^2 +6x +8+5x-13
16x^2 + 11x -9. (this is the simplified form)
when x = -2
its value = 64 - 22 -9
= 33
16x^2 + 11x -9. (this is the simplified form)
when x = -2
its value = 64 - 22 -9
= 33
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