Question

solve it by factorisation​

Answer 1

Answer:

X= -9.686            or X= 69.686

Step-by-step explanation:

using formula method

X= [ -B +/- √{(B² - 4AC)] /2A

a=1, b=-30,c=-1350

x= -(-30) +/-√ [(-30)² - 4*1*-1350)] /2*1

X= 30 +/-√(900+5400)/2

X= 30  +/-√6300)/2

X= 30  +/- (30√7)/2

X= 30- (30√7)/2 or X=30+ (30√7)/2

X= 30-15 √7        or X 30+15√7

X= -9.686            or X= 69.686

Note if the question is asking for one answer always pick the positive one.