Question

(iv) 8(p + q)2 – 6(p2 - q2) - 9(p - q)2
factorise​

Answer 1

Step-by-step explanation:

i)p

2

+6p+8=p

2

+3×2p+9−9+8

=(p+3)

2

−1=(p+3−1)(p+3+1)

=(p+2)(p+4)

ii)q

2

−10q+21=q

2

−5×2q+25−25+21

=(q−5)

2

−2

2

=(q−5−2)(q−5+2)

=(q−7)(q−3)

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