Multiply (8x+4)(8x^2+2x+8) My work; 8x^2 +2x +8 8x+4 32x^2+8x + 32 64x^2+16x^2+64x 64x^2+48x^2+72x+32 112x^2+72x+32 Have I done a good job?
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Originally Posted by NotThatGood Multiply (8x+4)(8x^2+2x+8) My work; 8x^2 +2x +8 8x+4 32x^2+8x + 32 64x^2+16x^2+64x 64x^2+48x^2+72x+32 112x^2+72x+32 Have I done a good job? $\displaystyle (8x+4)(8x^2+2x+8)$ $\displaystyle =64x^3+16x^2+64x+32x^2+8x+32$ $\displaystyle =64x^3=48x^2+72x+32$
Originally Posted by mathaddict $\displaystyle (8x+4)(8x^2+2x+8)$ $\displaystyle =64x^3+16x^2+64x+32x^2+8x+32$ $\displaystyle =64x^3=48x^2+72x+32$ typo: $\displaystyle =64x^3$+$\displaystyle 48x^2+72x+32$ of course.
Originally Posted by NotThatGood Multiply (8x+4)(8x^2+2x+8) My work; 8x^2 +2x +8 8x+4 32x^2+8x + 32 64x^2+16x^2+64x 64x^2+48x^2+72x+32 8x^2 times 8x is 64x^3, not 64x^2. 112x^2+72x+32 Have I done a good job?
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