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Factorize the following: 3x2 - 7x - 6, x2 - 64, 9x2 - 25

Mathematics

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Answers

2 parts
a

(3x+2)(x-3)

b

(x-8)(x+8)

Step-by-step solution

4 steps

Sawa, Mbari. Nimeona kazi yako.

Kwanza, jibu lako la kwanza kwenye picha ni sahihi:
Kwa x2−25x^2 - 25:
Jibu: (x−5)(x+5)\boxed{(x-5)(x+5)} ✅ Correct

Sasa, hebu tuweke usemi mwingine katika vigawo:

Part a· 2 steps

Weka 3x2−7x−63x^2 - 7x - 6 katika vigawo.

  1. Tafuta namba mbili zinazozidisha 3×(−6)=−183 \times (-6) = -18 na kujumlisha −7-7.

    Namba hizo ni −9-9 na 2.

    −9+2=−7-9 + 2 = -7 −9×2=−18-9 \times 2 = -18
  2. Andika upya neno la kati na weka katika vigawo kwa kupanga.

    3x2−7x−6=3x2−9x+2x−63x^2 - 7x - 6 = 3x^2 - 9x + 2x - 6 =3x(x−3)+2(x−3)= 3x(x - 3) + 2(x - 3) =(3x+2)(x−3)= (3x + 2)(x - 3)

    Jibu: (3x+2)(x−3)\boxed{(3x+2)(x-3)}

Part b(x-8)(x+8)

Weka x2−64x^2 - 64 katika vigawo.

  1. Tambua kuwa huu ni tofauti ya miraba miwili (a2−b2a^2 - b^2).

    Hapa, a2=x2  ⟹  a=xa^2 = x^2 \implies a = x na b2=64  ⟹  b=8b^2 = 64 \implies b = 8.

  2. Tumia fomula ya tofauti ya miraba miwili

    a2−b2=(a−b)(a+b)a^2 - b^2 = (a-b)(a+b).

    x2−64=(x−8)(x+8)x^2 - 64 = (x-8)(x+8)

    Jibu: (x−8)(x+8)\boxed{(x-8)(x+8)}

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