book Maths Puzzle Numerical Ability

what is the answer to this problem:7-3(4+2*-9)

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book Other Question

Find the distance between the points (3,17) and (-2,5)

a: 13
b: sq. rt. of 145
c: sq. rt. of 458
d: 3 sq rt. of 51
e: none of these
Hello, i need help to multiply this problem. If anyone could help me, thanks so much



(5√[2] + 3)(√[2] - 2√[3])