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Factorise 15a^2 + ab - 6b^2

15a 2 +ab-6b 2 =(?a+?b)(?a-?b) factors of 15= 3 and 5 factors of 6= 2 and 3 if we try (3a+2b)(5a-3b) that gives us 15a 2 +10ab-9ab-6b 2 = 15a 2 +ab-6b 2 therefore the answer is (3a+2b)(5a-3b)
AB
Answered by Aayushi B. • Maths tutor
3511 Views

A fridge of height 2m and width 0.8m is tilted in a delivery van so that one edge rests on the edge of a table and another touches the ceiling, as shown in the diagram. The total height of the inside of the van is 1.5m. Find the height of the table.

Let h be the height of the table. Let the edges of the fridge be A touching the ceiling, B touching the table and C touching the floor. Let D be the point on the ceiling vertically above B and E be the point...
CH
Answered by Charles H. • Maths tutor
3544 Views

Solve the equation [(3x + 3)/2x] + 2x - 1 = -3

In this question we are trying to find all the possible solutions of the variable x that will satisfy the given equation. Firstly, we see there is a denominator on one of the terms so we multiply all the ter...
CB
Answered by Chris B. • Maths tutor
3847 Views

Solve x^2+6x+5=0 for x

x 2 +6x+5=(x+5)*(x+1)=0 therefore x+5=0 or x+1=0, hence x=-5 and x=-1
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Answered by William R. • Maths tutor
3559 Views

x^2 - 10x + 33 ≡ (x - a)^2 + b. Work out the value of a and b.

x 2 - 10x + 33 ≡ (x - a ) 2 + b Work out the value of a and b . Our aim here is to write the expression on the left in the same form as the one on the right so that we can compare the two. Therefore, conside...
JC
Answered by Joshua C. • Maths tutor
12149 Views