Question

factorisation metod
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Answer 1

Answer:

1)√3x²+10x+7√3=√3x²+3x+7x+7√3

=√3x(X+√3)+7(X+√3)

=(√3x+7)(X+√3)

X=-7/√3 or X=-√3

2)2x²+4x-16=2x²+8x-4x-16

=2x(X+4)-4(X+4)

=(2x-4)(X+4)

X=2 or X=-4

3)9x²+24x+16=

a=9 b=24 c=16

d=b²-4ac

=576-4(9)(16)

=0

X1 ,x2=-b+-√d/2a

=-24+-√0/2(9)

=-24/18

=-4/3

4)3x²+12x+15=

a=3 b=12 c=15

d=b²-4ac

=144-4(3)(15)

=144-180

=-36< 0

So the quadratic equation has no real roots.