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Cynnig a Gwella

Cynnig a Gwella. Darganfod datrysiadau trwy gynnig ateb a’i wella. Cynnig a Gwella. Er mwyn datrys hafaliadau fel x 2 -x=8, rhaid i ni gynnig rhif ac yna gwella ar y cynnig ar ôl gweld yr ateb, ac yna mae’r cylch yn dechrau eto.

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Cynnig a Gwella

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  1. Cynnig a Gwella Darganfod datrysiadau trwy gynnig ateb a’i wella

  2. Cynnig a Gwella Er mwyn datrys hafaliadau fel x2-x=8, rhaid i ni gynnig rhif ac yna gwella ar y cynnig ar ôl gweld yr ateb, ac yna mae’r cylch yn dechrau eto. Enghraifft 1: Darganfyddwch werth x (i 1 lle degol) fel bod x2-x=8. Enghraifft 2: Beth yw gwerth x, i 2 le degol, fel bod x3-2=4? x=0 x2-x=0 x=1 x2-x=0 x=0 x3-2=-2 x=2 x2-x=2 x=1 x3-2=-1 x=3 x2-x=6 x=2 x3-2=6 x=4 x2-x=12 x=1.5 x3-2=1.375 x=3.5 x2-x=8.75 x=1.75 x3-2=-3.359375 x=3.25 x2-x=7.3125 x=3.4 x2-x=8.16 x=3.3 x2-x=7.59 x=3.35 x2-x=7.8725

  3. Cynnig a Gwella • Beth yw gwerth x, i 1 lle degol, pan fo x2+x=21? • Darganfyddwch werth y i 2 ffigwr ystyrlon fel bod y2-5y=1? • Darganfyddwch werthoedd x sy’n bodloni’r hafaliadau canlynol: (Rhowch eich atebion i 2 le degol) • a2+3a=66 • b2-b=50 • c2+2c=18 • Beth yw gwerth x, i 1 lle degol, pan fo x2-x=200? • Darganfyddwch werth y i 3 ffigwr ystyrlon, pan fo y2-2y=1 • Beth yw gwerth x, i 2 ffigwr ystyrlon, pan fo x2+x=1? • Darganfyddwch werth x, i 3 lle degol, pan fo x3+5x=80

  4. Creu fformiwlâu Weithiau mae angen i ni greu y fformiwla cyn gallu darganfod beth yw gwerth x i unrhyw nifer o lefydd degol. Enghraifft: Mae gan betryal ochrau x, ac x+1. Ei arwynebedd yw 10cm2. Beth yw gwerth x i 1 lle degol? x x+1 Arwynedd petryal = hyd x lled = x(x+1) = x2 + x Felly, x= 2.7cm i 1 lle degol

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