3年数学教科書解答①...x2 — 2x — 3 X 2 — 10x+ 16 x 2 + 3x 2 4x— 12 X 2 — 7X-l- 12 15 a 2 — 15a 56 x2—x— 30 x2 + 0.2x — 0.08 15 x2 — 49 a 2 + 20b + b2 x2

Page 1 <img data-url='document/3-ceca-x2-a-2x-a-3-x-2-a-10x-16-x-2-3x-2-4xa.html?page=1' data-page='1' class='cut-thumb lazyload' alt='Page 1: 3年数学 教科書解答①...x2 — 2x — 3 X 2 — 10x+ 16 x 2 + 3x 2 4x— 12 X 2 — 7X-l- 12 15 a 2 — 15a 56 x2—x— 30 x2 + 0.2x — 0.08 15 x2 — 49 a 2 + 20b + b2 x2' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022050605/5fac44b7978dce24af2dbe15/html5/thumbnails/1.jpg' width='140' height='200' /> Page 2 <img data-url='document/3-ceca-x2-a-2x-a-3-x-2-a-10x-16-x-2-3x-2-4xa.html?page=2' data-page='2' class='cut-thumb lazyload' alt='Page 2: 3年数学 教科書解答①...x2 — 2x — 3 X 2 — 10x+ 16 x 2 + 3x 2 4x— 12 X 2 — 7X-l- 12 15 a 2 — 15a 56 x2—x— 30 x2 + 0.2x — 0.08 15 x2 — 49 a 2 + 20b + b2 x2' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022050605/5fac44b7978dce24af2dbe15/html5/thumbnails/2.jpg' width='140' height='200' /> Page 3 <img data-url='document/3-ceca-x2-a-2x-a-3-x-2-a-10x-16-x-2-3x-2-4xa.html?page=3' data-page='3' class='cut-thumb lazyload' alt='Page 3: 3年数学 教科書解答①...x2 — 2x — 3 X 2 — 10x+ 16 x 2 + 3x 2 4x— 12 X 2 — 7X-l- 12 15 a 2 — 15a 56 x2—x— 30 x2 + 0.2x — 0.08 15 x2 — 49 a 2 + 20b + b2 x2' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022050605/5fac44b7978dce24af2dbe15/html5/thumbnails/3.jpg' width='140' height='200' />

3年数学 教科書解答①...x2 — 2x — 3 X 2 — 10x+ 16 x 2 + 3x 2 4x— 12 X 2 — 7X-l- 12 15 a 2 — 15a 56 x2—x— 30 x2 + 0.2x — 0.08 15 x2 — 49 a 2 + 20b + b2 x2

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3年数学教科書解答①...x2 — 2x — 3 X 2 — 10x+ 16 x 2 + 3x 2 4x— 12 X 2 — 7X-l- 12 15 a 2 — 15a 56 x2—x— 30 x2 + 0.2x — 0.08 15 x2 — 49 a 2 + 20b + b2 x2