Matthew Soon's answer to Kkk's Secondary 2 Maths Singapore question.
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(a) Factorize by (1/9) first so your constants are whole
(1/9)(4p^2 + 9p - 9)
= (1/9)(4p-3)(p+3)
(b) Factorize step by step. Start with (1/5) first to make all the constants whole; then factorize common terms (in this case, its r), then factorize the quadratic expression of q terms.
(1/5)(3r - 4qr - 64q^2r)
= (r/5)(3 - 4q - 64q^2)
= (r/5)(-16q+3)(4q+1)
(1/9)(4p^2 + 9p - 9)
= (1/9)(4p-3)(p+3)
(b) Factorize step by step. Start with (1/5) first to make all the constants whole; then factorize common terms (in this case, its r), then factorize the quadratic expression of q terms.
(1/5)(3r - 4qr - 64q^2r)
= (r/5)(3 - 4q - 64q^2)
= (r/5)(-16q+3)(4q+1)
Date Posted:
3 years ago
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