(2x-3)(3x+2)+(2x-1)(3x-2)-2x(x-3) plspls
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EXEMPLELE:
1. (x 3 − 6x 2 + 2x + 4) + (x 3 + 5x 2 − 7x) = (x 3 + x 3 ) + (−6x 2 + 5x 2 ) + (2x − 7x) + 4 = 2x 3 − x 2 − 5x + 4 2. (x 3 − 6x 2 + 2x + 4) − (x 3 + 5x 2 − 7x) = x 3 − 6x 2 + 2x + 4 − x 3 − 5x 2 + 7x = (x 3 − x 3 ) + (−6x 2 − 5x 2 ) + (2x + 7x) + 4 = −11x 2 + 9x + 4 3. x3 − 6x 2 + 2x + 4 − x 3 + 5x 2 − 7x = (x 3 − x 3 ) + (−6x 2 + 5x 2 ) + (2x − 7x) + 4 = −x 2 − 5x + 4 4. 5(3t − 4) − (t 2 + 2) − 2t(t − 3) = 15t − 20 − t 2 − 2 − 2t 2 + 6t = (−t 2 − 2t 2 ) + (15t + 6t) − 20 − 2 = −3t 2 + 21t − 22
1. (x 3 − 6x 2 + 2x + 4) + (x 3 + 5x 2 − 7x) = (x 3 + x 3 ) + (−6x 2 + 5x 2 ) + (2x − 7x) + 4 = 2x 3 − x 2 − 5x + 4 2. (x 3 − 6x 2 + 2x + 4) − (x 3 + 5x 2 − 7x) = x 3 − 6x 2 + 2x + 4 − x 3 − 5x 2 + 7x = (x 3 − x 3 ) + (−6x 2 − 5x 2 ) + (2x + 7x) + 4 = −11x 2 + 9x + 4 3. x3 − 6x 2 + 2x + 4 − x 3 + 5x 2 − 7x = (x 3 − x 3 ) + (−6x 2 + 5x 2 ) + (2x − 7x) + 4 = −x 2 − 5x + 4 4. 5(3t − 4) − (t 2 + 2) − 2t(t − 3) = 15t − 20 − t 2 − 2 − 2t 2 + 6t = (−t 2 − 2t 2 ) + (15t + 6t) − 20 − 2 = −3t 2 + 21t − 22
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x^2 - x la puterea a doua;
6x^2+4x-9x^2-6+6x^2-4x-3x+2-2x^2+6x=x^2+3x-4
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