What is expand (2pq-9r)(9pq+2r) ?

The solution to expand (2pq-9r)(9pq+2r) is 18p^2q^2-77pqr-18r^2

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expand (2pq-9r)(9pq+2r)

expand

(2 pq - 9 r) (9 pq + 2 r)

18 p^{2} q^{2} - 77 pq r - 18 r^{2}

Solution steps

(2 pq - 9 r) (9 pq + 2 r)

Apply FOIL method

(2 pq - 9 r) (9 pq + 2 r) : 18 p^{2} q^{2} - 77 pq r - 18 r^{2}

= 18 p^{2} q^{2} - 77 pq r - 18 r^{2}

6 x^{2} + 6 x + 2 - (2 x - 1)^{2}

5 x^{2} + 31 x + 30

2^{2} + 2^{2}

(4 x^{3} + y^{3})^{2}

81 x^{4} y^{7} z + 24 x y z^{4}

What is expand (2pq-9r)(9pq+2r) ?
The solution to expand (2pq-9r)(9pq+2r) is 18p^2q^2-77pqr-18r^2