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The area of a rectangular painting is given by the trinomial x2 + 4x – 21. What are the possible dimensions of the painting? Use factoring. (1 point)x + 7 and x + 3 x – 7 and x + 3x – 7 and x – 3x + 7 and x – 3
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fractorise the quadratic to find the dimensions... you don't need to solve... just identify the factors... they can then be written and length and width... in any order
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