Hence solve the equation $$$4 x^{3}+17 x^{2}+9 x-18=0$$$. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................

Mathematics

IGCSE&ALevel

CAIE

Exam No：9709_m20_qp_22 Year：2020 Question No：2(b)

Answer:

State or imply equation is $(4 x-3)\left(x^{2}+5 x+6\right)=0$
Attempt solution of cubic equation to find three real roots
Obtain $-3,-2, \frac{3}{4}$

Knowledge points:

1.1.3 solve quadratic equations, and quadratic inequalities, in one unknown (By factorising, completing the square and using the formula.)

Answer:

Knowledge points:

Solution:

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